ABANDONED HARD ROCK MINE PRIORITY SITES 1994 …ABANDONED HARD ROCK MINE PRIORITY SITES 1994 SUMMARY REPORT Prepared For: Montana Department of State Lands ... (LAP) describes laboratory

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MONTANA DEPARTMENT OF STATE LANDS ABANDONED MINE RECLAMATION BUREAU

ABANDONED HARD ROCK MINE PRIORITY SITES 1994

SUMMARY REPORT

Prepared For:

Montana Department of State Lands Abandoned Mine Reclamation Bureau

1625 Eleventh Avenue Helena, Montana 59620

Prepared By:

Pioneer Technical Services, Inc. P.O. Box 3445

Butte, MT 59702

Engineering Services Agreement DSL-AMRB No. 94-006

DECEMBER 1994

The cover photograph is of the Drumlummon Mill Tailings located in Marysville, Montana. This photograph was graciously provided by the Montana Historical Society for use on this cover.

THIS DOCUMENT IS PRINTED ON RECYCLED PAPER

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• TABLE OF CONTENTS

1.0 INTRODUCTION ................................................. 1-1

1.1 PROJECT OBJECTIVES .................................. , .. 1-2 1.2 PROJECT DESCRiPTION .................................... 1-4 1.3 SUMMARY OF FINDINGS .................................... 1-5

2.0 INVESTIGATION METHODS ....................................... 2-1

2.1 DATABASE AND LITERATURE SEARCH ........................ 2-1 2.2 FIELD METHODS ........................................... 2-2

3.0 DATA EVALUATION AND COMPARISONS ........................... 3-1

3.1 DATA VALIDATION AND EVALUATION ......................... 3-1

3.1.1 Laboratory Data Validation and Evaluation ................. 3-1 3.1.2 X-Ray Fluorescence Spectrometer Data Validation .......... 3-2 3.1.3 Other Field Measurements ............................. 3-2 • 3.2 DATA INTERPRETATION .................................... 3-2

3.2.1 Background Soil Comparison ........................... 3-2 3.2.2 Observed Releases to Groundwater, Surface Water,

and Sediment ....................................... 3-2 3.2.3 MCUMCLG, Aquatic Life Criteria Comparisons ............. 3-3

3.3 DATA MANAGEMENT ....................................... 3-3

4.0 SITE RANKING ............................................... :.4-1

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5.0 SITE SUMMARY FORMS

Beaverhead County Page No. HeclaNipond Park True Blue 01-138 5-1 • Lemhi Thorium City 01-500 5-2

Broadwater County Indian Creek Bullion King 04-081 5-3

Winston Custer Millsite 04-006 5-4 Kleinschmidt 04-010 5-5 Golden Age 04-050 5-6 Sunrise/January 04-130 5-7 Aurora Millsite 04-500 5-8 Chartam 04-501 5-9

Cascade County Neihart Broadwater 07-079 5-10

Hartley 07-082 5-11 Queen of the Hills 07-085 5-12 Emma 07-144 5-13 Rebellion Mine (Upper & Lower) 07-157 5-14 Ripple Mines 07-163 5-15 Lexington No.4 07-167 5-16 Hutchinson 07-177 5-17 Snow Creek Millsite 07-505 5-18 • Fergus County

Warm Springs Gilt Edge Tailings 14-008 5-19 Western Mine/Millsite 14-030 5-20 Prester John 14-090 5-21

Granite County Alps Argo 20-081 5-22

Frog Pond Millers Mine 20-176 5-23

Garnet Free Coin/Red Cloud 20-134 5-24

Philipsburg Little Gem 20-071 5-25 Wenger No.2 20-073 5-26

Jefferson County Basin Josephine 22-031 5-27

Doris 22-293 5-28 Lady Leith 22-316 5-29 Old Basin Millsite 22-500 5-30 • CresenUAlsace 22-106 Cataract 5-31 Boulder Chief 22-132 5-32 Rocker/Ada 22-170 5-33

Jefferson County ~age No. Colorado Crawley Camp 22-028 5-34

• Elkhorn Carmody 22-337 5-35 Iron 22-359 5-36 Trumley Heap Leach 22-501 5-37 Elkhorn Creek Tailings 22-502 5-38

Judith Basin County Hughesville DannyT 23-500 5-39

Yogo Roncor/Amax Sapphire 23-501 5-40

Lewis & Clark County Helena Josyln Street Tailings 25-501 5-41

Marysville Drumlummon Mine/MililTailings 25-024 5-42

Rimini Peerless Jenny/King 25-006 5-43 Woodrow Wilson 25-258 5-44 Peter 25-259 5-45 Queensbury 25-262 5-46 Monte Cristo 25-275 5-47 National Extension 25-287 5-48

• Monitor Creek Tailings 25-503 5-49 Bear Gulch 25-504 5-50

Stemple Jay Gould Mine/Millsite 25-500 5-51 New Jay Gould Millsite 25-502 5-52

Madison County Pony Garnet Gold Mine 29-035 5-53

Chicago Mining Corp. Pony Mill 29-500 5-54

Virginia City U.S. Grant 29-095 5-55 Belle 29-098 5-56 Prospect 29-136 5-57

Mineral County SI. Regis Gold Chrome 31-037 5-58

Missoula County Clinton Wallace Creek Millsite 32-019 5-59

Copper Cliff Copper Cliff 32-001 5-60

tlrkcounty

Frogs Diner 32-027 5-61

New World Great Republic Smelter 34-000 5-62

TABLE OF CONTENTS (Cont'd) . • 6.0 REFERENCES .................................................. 6-1

GLOSSARY

LIST OF TABLES

TABLE 1-1 ABANDONED HARDROCK MINES SITES PRIORITY LIST ........ 1-3 TABLE 4-1 ABANDONED HARDROCK MINES SITES AIMSS RANKING ....... 4-1 TABLE 4-2 ABANDONED HARD ROCK MINES SITES SAFETY RANKING ..... 4-2

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1.0 INTRODUCTION

This document is a supplement to the 1993 Hazardous Materials Inventory Summary Report published by the Montana Department of State Lands/Abandoned Mine Reclamation Bureau (MDSUAMRB). The Hazardous Materials Inventory was implemented to consistently characterize and rank the extent of environmental problems associated with the Abandoned Hardrock Mine Priority Sites. This 1994 supplemental report includes an additional 62 sites to the 270 sites inventoried in 1993.

This report is organized into five sections. Section 1.0 presents the introduction, project objectives, a brief description of the project tasks, and a summary of the findings. Section 2.0 briefly describes field methods used during the inventory. Section 3.0 discusses data evaluation techniques and data management for the project. Section 4.0 presents a brief description of the Abandoned and Inactive Mines Scoring System (AIMSS) which was developed to rank the priority sites. Section 5.0 presents one page summaries for each of the priority sites. The summaries typically provide details about each site, such as volumes of wastes, contaminant concentrations, observed releases to surface water and groundwater, water quality criteria exceedances, and potential safety hazards.

This summary report is supported by several other project documents and databases, including:

• The Sampling and Analysis Plan (SAP) presents the sampling approach for the Abandoned Mines Hazardous Materials Inventory. This SAP also contains instructions on completing the Inventory Form and the Standard Operating Procedures (SOPs) for conducting the field sampling activities (Pioneer, 1994a).

• The Quality Assurance Project Plan (QAPjP) describes quality assurance procedures used for evaluating the filed and lab data for the project (Pioneer, 1994b).

• The Laboratory Analytical Protocol (LAP) describes laboratory requirements for the project (Pioneer, 1994c).

• The Health and Safety Plan (HSP) describes practices and procedures to be followed by field investigators who performed the project to minimize exposure to hazardous materials and to eliminate any possibility of physical injury (Pioneer, 1994d).

• The Abandoned Hardrock Mines Project Report is a compilation of the reports listed above, as well as this Summary Report, the AIMSS Report, the Data Validation/Evaluation Report, and the completed Hazardous Materials Inventory Forms for each site (Pioneer, 1994e).

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• The Abandoned Hardrock Mine Priority Sites, Hazardous Materials Inventory Databases.

The complete Abandoned Hardrock Mines Project Report including the 1993 and 1994 inventories can be viewed in Helena, Montana, at the Montana State Library; the MDSUAMRB office; or the Montana Department of Health and Environmental Sciences/Solid and Hazardous Waste Bureau (MDHES/SHWB) office or in Missoula, Montana, at the United States Department of Agriculture/Forest Service (USFS), Region 1 office.

1.1 PROJECT OBJECTIVES

There are an estimated 6,000 abandoned or inactive hardrock mine and milling sites in Montana. This legacy of Montana's mining past has left a wide range of problems and challenges for the MDSUAMRB and other state and federal agencies charged with the reclamation and mitigation of these problems.

The problems associated with the abandoned and inactive hard rock mine sites are varied and range from safety hazards caused by hazardous mine openings, dangerous highwalls, and dilapidated structures, to threats to human and non-human life and the environment by mining waste containing elevated levels of heavy metals and other contaminants. To date, the MDSUAMRB has conducted a great deal of work to

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eliminate the problems of unsafe openings, highwalls, and structures,and has made • over 1,500 of these sites safer.

In 1991, the MDSUAMRB concluded that substantial progress had been made in eliminating imminent hazards to public health and safety at abandoned hard rock mine sites. However, limited progress was realized with regard to the problems relating to heavy metal and mineral processing reagent contamination of surface water and groundwater. Not only were these sites causing severe environmental degradation, but they were also the sites of highest concem to the public. Additionally, the MDSUAMRB recognized that there were a number of other state and federal programs that had resources available to address their problems, but there was no coordinated approach to determining which specific sites should be addressed first. As a result, the MDSUAMRB solicited various state and federal agencies, requesting assistance in the identification of suspected problem sites. The following agencies responded to the MDSUAMRB request: USFS-Region 1, the United States Department of the Interior/Bureau of land Management (BlM), MDHES, and the Montana Department of Natural Resources and Conservation (DNRC). A list of the 270 suspect sites was compiled from the input of these agencies supplemented by a review of existing data from the MDSUAMRB master inventory. This list included the majority of the highest potential hazard sites in Montana. These sites were investigated and inventoried during the 1993 field season. As result of the 1993 inventory activities and continued records searches, 62 additional sites were identified, investigated, and ranked during the 1994 field season by the MDSUAMRB. This 62-site supplement to the 1993 priority • sites list is presented in Table 1-1.

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CO/Ufty District Site Name PA /I Beaverhead HeclaNipond Park True Blue 01-138 Beaverhead Lemhi Thorium City 01-500 Broadwater Indian Creek Bullion King 04-081 Broadwater Winston Custer Mills~e 04-008 Broadwater Winston Kleinschmidt 04-010 Broadwater Winston Golden Age 04-050 Broadwater Winston Sunrise/January 04-130 Broadwater Winston Aurora MiII~e 04-500 Broadwater Winston Chartam 04-501

Cascade Neihart Broadwater 07-079 Cascade Neihart Harley 07-082 Cassade Neihart Queen of the Hills 07-085 Cascade Neihart Emma 07-144 Cascade Neihart Rebellion Mine (Upper & Lower) 07-157 Cascade Neihart Ripple Mines 07-163 Cascade Neihart Lexington No.4 07-167 Cascade Neihart Hutchinson 07-177 Cascade Neihart Snow Creek Mills~e 07-505 Fergus Warm Springs Gi~ Edge Tailings 14-008 Fergus Warm Springs Western Mine/Mills~e 14-030 Fergus Warm Springs Prester John 14-090 Gran~e Alps Argo 20-081 Gran~e Frog Pond Millers Mine 20-176 Gran~e Gamet Free Coin/Red Cloud 20-134 Gran~e Philipsburg Little Gem 20-071 Gran~e Philipsburg Wenger No. 2 20-073

Jefferson Basin Josephine 22-031 Jefferson Basin Doris 22-293 Jefferson Besin Lady Le~ 22-316 Jefferson Basin Old Basin Mills~e 22-500 Jefferson Cataract CresentiAlsace 22-108

- Jefferson Cataract Boulder Chief 22-132 Jefferson Cataract Rocker/Ada 22-170 Jefferson Colorado Crawley Camp 22-028 Jefferson Elkhorn Carmody 22-337 Jefferson Elkhorn Iron 22-359 Jefferson Elkhorn Trumley Heap Leach 22-501 Jefferson Elkhorn Elkhorn Creek Tailings 22-502 Jud~ Basin Hughesville Danny T 23-500 Jud~ Basin Yogo Roncor/Amax Sapphire 23-501

Lewis & Clark Helena Josyln Street Tailings 25-501 Lewis & Clark Marysville Drumlummon Mine/MilVTamngs 25-024 Lewis & Clark Rimini Peerless Jenny/King 25-006 Lewis & Clark Rimini Woodrow Wilson 25-258 Lewis & Clark Rimini Peter 25-259 Lewis & Clark Rimini Queensbury 25-262 Lewis & Clark Rimini Monte Cristo 25-275 Lewis & Clark Rimini National Extension 25-287 Lewis & Clark Rimini Mon~or Creek Tailings 25-503 Lewis & Clark Rimini Bear Gulch 25-504 Lewis & Clark . Stemple Jay Gould Mine/Mills~e 25-500 Lewis & Clark Stemple New Jay Gould Mills~e 25-502

Madison Pony Gamet Gold Mine 29-035 Madison Pony Chicago Mining Carp. Pony Mill 29-500 Madison Virginia City U.S. Grant 29-095 Madison Virginia City Belle 29-098 Madison Virginia City Prospect 29-136 Mineral SI. Regis Gold Chrome 31-037

Missoula Clinton Wallace Creek Mills~e 32-019 Missoula Copper Cliff Copper Cliff 32-001 Missoula Copper Cliff Frogs Diner 32-027

Park New World Great Recublic Sme~er 34-000

TABLE 1-1: 1994 ABANDONED MINE PRIORITY SITES

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The agencies previously listed agreed to a cooperative course of action, with MDSUAMRB designated as the lead agency. The agencies established the following • objectives:

• To identify and prioritize those abandoned mine sites that are presently the most serious threats to public health and safety and the environment.

• To collect data on each priority site in a consistent manner to identify problems associated with each site and to directly compare and rank sites. All sampling and analysis methods will strictly follOW United States Environmental Protection Agency (EPA) protocols to ensure consistent and accurate results.

• To develop a long-term strategy to utilize statutory and financial resources available to systematically reduce the hazards associated with the prioritized abandoned mine sites.

Upon completion of this report, the first two objectives stated above are fulfilled, and the framework to complete the third objective is in place.

1.2 PROJECT DESCRIPTION

The additional 62 priority sites investigated during the 1994 field season under the Abandoned Mines Hazardous Materials Inventory were located in 12 counties and in 26 out of the 206 mining districts in Montana. Site investigations began June 6, 1994, and were completed on August 17, 1994. One field crew consisting of three to four scientists, engineers, and technicians were in the field for approximately 50 days to complete the data collection effort.

The site investigation conducted at each site involved the following tasks: overall site reconnaissance; mapping; collection of tailings, slag, waste rock, adit discharge, flooded shafts, stream water, and sediment samples; field analysis of solid matrix samples using an X-ray Fluorescence (XRF) Spectrometer; and measurements of field parameters in water, including flow rates, pH, specific conductance, temperature, oxidation reduction potential, and alkalinity. The field team members also photographed sample locations and significant site features, video taped the site, and evaluated safety hazards.

The period during which the field investigations were conducted in 1994 was much drier than the 1993 field season, which was abnormally wet. There were 22 days of measurable preCipitation with a total accumulation of only 3.40 inches (measured at Butte, Montana) during the 1994 field investigation period. This compared to 69 days of measurable preCipitation with a total accumUlation of 11.2 inches during the 1993 field season. The reduced amount of precipitation may have resulted in decrease in

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the documentation of observed releases to surface water that would have been • occurring under 1993 conditions.

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The physical setting and topography associated with these sites ranged from gently sloping land in valley bottoms to very steep, high elevation, mountainous areas. Access to sites was often difficult due to poor road conditions or absence of maintained roads. Access to several sites was limited to travel on foot or by helicopter. Ownership of the priority sites is a mix of public lands (USFS, BlM, MDSl, etc.) and patented lands (private ownership). The priority sites consist of primarily inactive/abandoned mine sites; however, exploration activities were in progress at several of the sites.

Significant features at the sites included tailings ponds, impoundments, and piles; waste rock dumps or piles; mine openings, including adits, shafts, glory holes, and exploration trenches; miscellaneous buildings and structures; and roads. Mine opening discharges and streams adjacent to or flowing through the sites were common.

Hazardous materials observed at some of the sites included chemical reagents, solvents, asbestos-containing material, petroleum fuels or lubricating oils storage (barrels or tanks) and miscellaneous power supply items (poles, transformers, lines, etc.). Some of the sites support wildlife, domestic grazing, or aquatic life. Residential occupation of the sites was observed in rare cases, but residences located adjacent to the sites occurred more frequently. "

1.3 SUMMARY OF FINDINGS

The following information is provided as an overview of the data compiled during the 1994 supplemental investigation to the Hazardous Materials Inventory.

laboratory Sampling • Total number of lab samples: 409 (does not include the QA/QC duplicates),

representing approximately 9,000 data points generated by the laboratories. • Total number of XRF samples: 608 (does not include the QA/QC duplicates),

representing approximately 12,800 data points.

Waste Rock Associated with the Priority Sites • Estimated total volume: 501,950 cubic yards. • Estimated total area: 2,399,340 square feet (55.1 acres). • Estimated total unvegetated/uncovered area: 2,156,647 square feet (49.5

acres).

Mill Tailings Associated with the Priority Sites • Estimated total volume: 597,692 cubic yards. • Estimated total area: 3,018,335 square feet (69.3 acres). • Estimated unvegetated/uncovered area: 1,496,230 square feet (34.3 acres).

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Adit Discharges Associated wjth the Priority Sites • Total number of discharging ad its: 47. • • Number of adit discharges with pH s 5.00: 10. • Number of adit discharges with pH s 6.00: 14.

Flooded Shafts Associated with the priority Sites • Total number of open shafts with water: 4. • Shafts with pH s 5.00: O. • Shafts with pH s 6.00: 2.

Water Qyality Criteria • Number of discharges exceeding Safe Drinking Water Act MCUMClGs: 28.

27 adits 1 shaft

• Number of adit discharges exceeding acute aquatic life criteria: 33. • Number of observed releases to surface water/sediment directly attributable: 28. • Number of observed releases to groundwater directly attributable: 1. • Acute aquatic life exceedances in surface water attributable to the site: 22. • MCl exceedances in surface water attributable to the site: 12.

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2.0 INVESTIGATION METHODS

2.1 DATABASE AND LITERATURE SEARCH

Data collected in the field was supplemented by an extensive literature search and the use of several computer databases. This supplemental information was used to complete the inventory forms and fulfill receptor information requirements for the AIMSS. The computer databases used to collect this information were:

• The Montana Bureau of Mines and Geology (MBMG) Well Logs Database, which was compiled by the MBMG and the DNRC. This database was used to estimate the number of wells within a one-and four-mile radius of each site.

• The Montana Rivers Information System (MRIS), Version 2.0, compiled by the Montana State Library for the Montana Department of Fish, Wildlife, and Parks (MDFWP). This database was used to assign classifications relating to riparian habitat quality, wetlands frontage, fisheries habitat and species classification, and sport fisheries classification for stream reaches potentially impacted by each site, where applicable.

• The MDHESlWater Quality Bureau (WQB) - Community Water Supplies Database. The MDHESJWQB provided a list of surface water resources presently used for drinking water supplies in Montana .

Addition information was obtained from the following sources:

• Peak and average stream flow estimates were obtained from United States Department of Interior/Geological Survey (USGS) flow monitoring reports on gaged streams.

• Population estimates were obtained by counting buildings delineated on the USGS quadrangle maps and USFS Forest Visitors Maps. Field observations supplemented this source of information.

• Land ownership was determined from USFS Forest Visitor Maps, unless more accurate records were available.

• Historic mine/millsite operations, mineralogy, and geology were obtained from several sources, including: United States Bureau of Mines (USBM) Circulars, USGS Bulletins and Professional Papers, and MBMG Memoirs, Bulletins, and Circulars .

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• Historic analytical data were obtained from the MDSUAMRB project files, the MDHES/SHWB project files, the MDHESIWQB, USFS project files, and MBMG data collected for the USFS. This data was reviewed prior to site visits to provide the investigators with background information on potential hazards associated with each site.

2.2 FIELD METHODS

A detailed discussion of specific investigation methodologies is found in the MDSUAMRB Hazardous Materials Inventory SAP (Pioneer, 1994a). The purpose of this section is to describe some of the unique details of the investigative methods used to fu Ifill the project objectives.

The inventory form used during the 1994 investigation was almost identical to the 1993 form with minor modifications to remove redundancies and streamline decision-making processes. The inventory form was used during the investigation to guide and focus the investigative tasks to ensure consistent evaluation of each site. Literature and database searches were performed prior to the field investigations to provide investigators with background information on each site.

Sampling was performed on waste rock dumps, mill tailings, streams, ponds, adit discharges, flooded shafts, and from domestic groundwater wells or monitoring wells, when present.

Each tailing's feature was characterized both spatially and vertically by hand-auguring to determine accurate depths and delineate stratification or differences in metals concentrations between the upper oxidized zone(s) and the lower reduced zones. Subsamples were collected from each visually different strata.

Typically, several subsamples were collected from each waste rock dump in order to better characterize very heterogeneous waste sources. Subsamples from the tailings and waste rock were analyzed in the field using XRF Spectrometers .. The field screening data allowed the investigators to make informed decisions on the number of samples required for laboratory analyses and indicated how best to composite the subsamples from the potential sources in order to send representative samples to the laboratory, while minimizing the number of samples to achieve this end. The XRF analyses also provided an increased number of valid and discrete data points per site achieving a more thorough understanding of the problems associated with each site. Solids were characterized additionally by measurement of pH and radioactivity.

Stream sediment samples were also analyzed in the field with the XRF in order to assist in the assessment the extent of contamination and migration from the waste sources.

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Surface water sampling was often conducted to characterize impacts to drainage basins, as well as contributions from individual sites, when multiple sources were present. Waters were additionally characterized in the field by measuring flow rates, pH, specific conductance, alkalinity, and temperature.

Site mapping was conducted using a Global Positioning System supplemented with standard "Chain and Compass" surveying techniques when necessary. The primary purpose of mapping was to estimate volume and area of waste sources and record sample locations. Other significant site features, such as streams or drainages, roads, mine openings, and structures, were also recorded on the site sketches. Sample locations and other significant site features were documented on photographic slides and video tape to assist the resource managers in their evaluation of the priority sites .

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3.0 DATA EVALUATION AND COMPARISONS

The purpose of this section is to discuss data quality validation and evaluations, as well as comparisons of the data to pertinent criteria.

3.1 DATAVALIPATIONAND EVALUATION

3.1.1 Laboratory Data Validation and Evaluation

The laboratory utilized during this investigation complied all of the QAlQC performance requirements defined in the Contract Laboratory Program (CLP) Statement of Work (SOW, March 1990). The data packages provided by the laboratory allowed comprehensive data validation and evaluation procedures to be completed. Laboratory data validation and evaluation were performed according to guidelines developed by the EPA.

The laboratory data were validated in accordance with the document Laboratory Data Validation Functional Guidelines for Evaluating Inorganics (EPA, 1988). The data validation procedures were performed partially by laboratory chemists and partially by a <:lata reviewer from Pioneer Technical Services, Inc. The data validation procedure included an evaluation of the following:

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holding times; initial and continuing calibrations; calibration and preparation blanks; inductively coupled plasma (ICP) interference check samples; laboratory control samples (LCS); laboratory duplicate sample analyses (precision assessment); matrix spike sample analyses (accuracy assessment); furnace atomic absorption (M) quality control; ICP serial dilutions; sample result verification; field duplicate analyses (precision assessment); field blank analyses; and overall assessment of data for the case.

Data evaluation occurred after the data validation process was completed and the appropriate qualifiers had been applied to the data. The data evaluation process involved a statistical analysis of the data to identify outliers and assess the quality of the data overall. Data evaluation was performed on the laboratory.data which met the Data Quality Objectives (DQOs) outlined in the QAPjP for the Abandoned Mines Hazardous Materials Inventory (Pioneer, 1994b).

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Although numerous qualifications (flags) were applied to the laboratory data compiled during this investigation, and a small portion of the data were evaluated as outliers, • none of the data were flagged "R" or were otherwise considered unusable. Consequently, 100 percent of the laboratory data (soil and water) collected during this investigation are considered valid and useable for all of the objectives of this project.

The limitations of the data should be considered when making interpretations. Please refer to the document entitled Data \lalidation and Evaluation Report for the Abandoned Mines Hazardoys Materials Inventory for a detailed description of the procedures followed and results provided by the overall data assessments.

3.1.2 X-Ray Fluorescence Spectrometer Data Validation

Data provided by the field portable XRF Spectrometer were also validated; the XRF data were validated according to manufacturer specifications. The validation procedures for XRF data were not nearly as rigorous as for laboratory data; consequently, additional procedures, utilizing standard statistical techniques, were employed to evaluate the overall quality of the XRF data. These additional procedures included assessment of XRF duplicate data to quantify precision, as well as comparing XRF data to corresponding laboratory data to assess inter-method preCision and correlation.

3.1.3 Other Field Measurements

Field parameter measurements, such as pH, Eh, and specific conductance, were not evaluated for data quality. Standard operating procedures (Pioneer, 1994a) were carefully followed in the field to achieve a consistent and acceptable level of quality.

3.2 DATA INTERPRETATION

The analytical data collected was compared to site-specific background or upgradient concentrations, as well as drinking water standards and aquatic life criteria. The following sections explain how these comparisons were made.

3.2.1 Background Soil Comparison

Background soil samples were collected to establish the extent to which metals concentrations were elevated in comparison to the local background. Background samples were typically applied to groups of sites in close proximity to one another and within similar geologiC units. Occasionally, background samples collected during the 1993 investigation were used.

3.2.2 Observed Releases to Groundwater, Surface Water, and Sediment

An observed release to surface water is defined as a downstream surface water or stream sediment concentration at more than three times the upstream surface water or

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sediment concentration, for any constituent that can be attributed to the site. Groundwater, surface water, and stream sediment analytical data was used to document observed releases from the priority sites.

3.2.3 MCUMCLG, Aquatic Life Criteria Comparisons

Maximum Contaminant Levels (MCLs) and Maximum Contaminant Level Goals (MCLGs) are drinking water standards promulgated under the federal Safe Drinking Water Act (SDWA), (40 CFR Parts 141, 143). MCLs, and MCLGs apply to public water systems; however, they may be relevant and appropriate to surface or groundwater if those waters are used as drinking water. Groundwater and surface water metals concentrations observed in samples collected were evaluated against these standards. The current SDWA MCLs and MCLGs expressed in micrograms per liter (ug/L) are:

Arsenic: 50 ug/L Copper: 1,300 ug/L Nickel: 100 ug/L Cyanide: 200 ug/L

Barium: 2,000 ug/L Chromium: 100 ug/L Antimony: 6 ug/L

Cadmium: 5 ug/L Mercury: 2 ug/L Lead: 15 ug/L

Surface water and mine discharge analytical results were also evaluated against the freshwater acute and chronic aquatic life criteria as presented in the Montana Numeric Water Quality Standards, Circular WQB-7, July 15, 1994. Some of these criteria are expressed as a function of total hardness and were corrected for the hardness measured in each sample, when applicable.

3.3 DATA MANAGEMENT

The data collected under this project has been input into the data manager dBase IV, Version 2.0. Four files were created to contain the data and aid in any manipulation of the data that may be desired. These files are summarized briefly below.

• PTSDATADBF contains field data collected for each sample during the Hazardous Materials Inventory;

• XRFDATADBF contains all the XRF analytical results generated in the field during the Hazardous Materials Inventory;

• LAB OAT A DBF contains the data from all of the laboratory analyses performed during the Hazardous Materials Inventory; and

• PRIORITY.DBF is the modified dBase file provided to Pioneer by MDSUAMRB from the master inventory.

The information from these four files can be readily combined with one another to form a relational database.

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4.0 SITE RANKING

The final task of the Hazardous Materials Inventory involved the development of a system to rank the severity of hazards or environmental threats associated with the sites investigated in order to assist the MDSUAMRB in prioritizing reclamation efforts and allocation of resources. This system, the Abandoned and Inactive Mines Scoring System (AIMSS), closely follows the EPA's Hazard Ranking System, although the AIMSS is specifically focused on potential hazards typically associated with the abandoned or inactive hard rock mines.

The AIMSS also evaluated potential safety hazards associated with the sites such as hazardous mine openings, highwalls, and structures, and generated a separate safety score for each site. The AIMSS utilized the data collected for each site to assign a ranking score.

The AIMSS is focused towards the physical site setting and potential hazards associated with abandoned and inactive mines due to its capability to evaluate mine opening discharges and large quantities of mine wastes. The AIMSS scoring method evaluates relative risks between sites. This accounts for site-specific contaminant concentrations and the varying toxicity of different constituents, as well as adit discharges in the source evaluation. This method more effectively discriminates between sites with higher concentrations or more toxic constituents in relation to sites with lower concentrations or less toxic constituents. In order to generate an overall Mine Site Human Health and Environmental Hazard Score, the AIMSS evaluates the groundwater pathway, surface water pathway, air pathway, and direct contact pathway. Under each pathway, the AIMSS evaluates observed releases, potential to release, pathway characteristics, waste characteristics, and targets.

Table 4-1 lists the 1994 supplemental priority sites and their associated AIMSS score, sorted in descending order. Three of the 62 sites were not ranked due to complications associated with collecting the necessary data. Two of the three unranked sites were inaccessible and no data was collected. The third unranked site had no identifiable mine waste material present on-site.

The AIMSS also generates a distinct safety score for each site by evaluating site accessibility and safety hazards present (Le., shafts, stopes, open adits, hazardous structures, and explosives/other hazardous materials or chemicals). Table 4-2 lists the 1994 supplemental priority sites and their associated safety score, sorted in descending order.

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1994 AlMS. RANK County District Site Name PAl SCORJ

1 Lewis & Clark Helena Josytn Street Tainngs 25-501 1894.49 2 Lewis & Clark Rimini National Extension 25-287 1309.35 3 Lewis & Clark Rimini Peerless JennylKing 25-006 175.26 4 Park New World Great Republic Smelter 34-000 97.91 5 Granite Philipsburg Wenger No.2 20-073 81.62 6 Lewis & Clark Rimini Monte Cristo 25-275 55.85 7 Jefferson Elkhorn Elkhorn Creek TaiUngs 22-502 54.32 8 MacflSOn Pony Garnet Gold Mine 29-035 45.76 9 Cascade Neihart Queen of the Hills 07.{]85 40.78

10 Jefferson Basin Josephine .22-031 26.88 11 Broadwater Winston Sunrise/January 04-130 26.64 12 Lewis & Clark Rimini Queensbury 25-262 26.58 13 Jefferson Elkhorn Carmody 22-337 16.51 14 Madison Virginia City Prospect 29-136 15.92 15 Broadwater Winston Kleinschmidt 04-010 12.83 16 Cascade Neihart Hartley 07-002 11.85 17 Madison Virginia City U.S. Grant 29-095 10.60 16 Cascade Neihart Broadwater 07-079 10.10 19 Lewis & Clark Marysville Drumlummon MineJMilVT ailings 25-024 9.70 20 Lewis & Clark Rimini Woodrow Wilson 25-258 9.69 21 Jefferson Basin Old Basin Milisite 22-500 9.60 22 Cascada Neihart Rebellion Mine (Upper & Lower) 07-157 9.07 23 Broadwater Indian Creek Bullion King 04-001 7.03 24 Jefferson Cataract Boulder Chief 22-132 5.64 25 Granite Philipsburg Little Gem 20-071 5.46 26 Jefferson Cataract CresentlAisace 22-106 4.64 27 Beaverhead HeclaNlpond Park True Blue 01-136 4.07 28 Fergus Warm Springs Gi~ Edge Tailings 14-008 4.04 29 Broadwater Winston Chartam 04-501 3.64 30 Jefferson Cataract Rocker/Ada 22-170 3.84 31 Broadwater Winston Golden Age 04-050 3.78 32 Fergus Warm Springs Prester John 14-090 3.05 33 Judith Basin Hughesville DannyT 23-500 2.46 34 Jefferson Basin Lady Leith 220316 2.14 35 Jefferson Colorado Crawley Camp 22-028 2.04 36 Missoula Clinton Wallace Creek Milisite 32-019 1.97 37 Lewis & Clark Rimin; Monitor Creek Tailings 25-503 1.72 38 Broadwater Winston Custer Millsite 04-006 1.51 39 Lewis & Clark Rimin; Patar 25-258 1.39 40 Cascade Neihart Ripple Mines 07-163 1.14 41 Granite Frog Pond Millers Mine 20-176 0.97 42 Cascade Neihart Lexington 07-167 0.83 43 Jefferson Basin Doris 22-293 0.79 44 Granite Alps Argo 20-001 0.77 45 Cascade Neihart Emma 07-144 0.63 46 Jefferson Elkhorn Trumley Heap Leach 22-501 0.52 47 Missoula Copper Cliff Copper Cliff 32-001 0.49 48 Madison Virginia City Belle 29-098 0.43 49 Missoula Copper Cliff Frogs Diner 32-027 0.37 50 Lewis & Clark Rimini Bear Gulch 25-504 0.35 51 Granite Gamet Free Coin/Red Cloud 20-134 0.26 52 Lewis & Clark Stemple Jay Gould MineJMilisite 25-500 0.23 53 Jefferson Elkhorn Iron 22.J59 0.13 54 Lewis & Clark Stemple New Jay Gould MHlsite 25-502 0.03 55 Cassade Neihart Snow Creek Milisite 07-505 0.02 58 Cascade Neihart Hutchinson 07-177 0.01 57 Fergus Warm Springs Western MineJMillsite 14-030 0.004 58 Mineral SI. Regis Gold Chrome 31-037 0.0007 59 Beaverhead Lemhi Thorium City 01-500 0.0003 60 Broadwater Winston Aurora Milisite 04-500 Not Ranked 61 Madison Pony Chicago Mining Corp. Pony Mill 29-500 Not Ranked 62 Judith Basin Yooo Roncor/Amax Sannhire 23-501 Not Ranked

TABLE 4-1: 1994 ABANDONED HARDROCK MINES PRIORITY SITES AMISS RANKING • 4-2

1994 SAFET RANK Countv District Site Name PA f# scom

1 Granite Philipsburg Wenger No.2 20-073 1152.00 2 Madison Virginia City Prospect 29-136 1102.50 3 Granite Philipsburg Little Gem 20-071 1054.00 4 Lewis & Clark Marysville Drumlummon MinBiMillITailings 25-024 590.00 5 Madison Virginia City U.S. Grant 29-095 566.50 6 Jefferson· Elkhom Carmody 22-337 435.00 7 Cascade Neihart Quaan of the Hills 07-085 405.00 8 Granite Gamet Frse Coin/Red Cloud 20-134 325.50 9 Jefferson Basin Old Basin Milisite 22-500 256.00 10 Beaverhead HeclaNipond Park True Blue 01-138 238.00 11 Jefferson Elkhorn Iron 22-359 118.50 12 Broa_ Winston Sunrise/January 04-130 108.90 13 Cascade Neihart Broadwater 07-078 104.00 14 Cascade Neihart Emma 07-144 94.60 15 Madison Virginia City Belle 29-098 92.60 16 Madison Pony Gamet Gold Mine 29-035 85.00 17 Cascade Neihart HarUey 07-082 nOll 18 Jefferson Cataract CresentJAisace 22-106 59.40 19 Jefferson Colorado Crawley Camp 22-028 55.20 20 Jefferson Basin Doris 22-293 51.60 21 Granite Frog Pond Millers Mine 20-176 50.40 22 Lewis & Clark Stample New Jay Gould Milisite 25-502 44.00 23 Fergus Warm Springs Prestar John 14-090 40.00 24 Lewis & Clark Rimini Manta Cristo 2S-275 38.50 25 Forgus Warm Springs Westem MineiMill&ite· 14-030 36.00 26 Missoula Clinton Wallace Creek Mill&ite 32-019 35.00 27 Judith Basin HughooV111e DannyT 23-500 30.00 28 Broadwater Indian Creek Bullion King 04-081 27.00 29 Jefferson Basin Lady Leith 22-316 26.00 30 Broadwater Winston Kleinschmidt 04-010 23.50 31 Cascade Neihart Ripple Mines 07-163 23.00 32 Lewis & Clark Rimini Woodrow Wilson 2S-258 22.60

- 33 Jefferson Cataract Boulder Chief 22-132 20.25 34 Jefferson Elkhom Elkhom Craak Tailings 22-502 20.00 35 Fergus Warm Springs Gift Edge Tailings 14-008 19.20 36 Lewis & Clark Rimini Peerless Jenny/King 2S-006 17.60 37 Lewis & Clark Rimini National Extension 25-287 16.50 38 Missoula Copper crlff Copper Cliff 32-001 13.60 38 Broadwater Winston Custer Millsite 04-006 6.25 40 Broa_ Winston Golden Age 04-050 7.30 41 Cascade Neihart Lexington NO.4 07-167 4.00 42 Jefferson Cataract Rocker/Ada 22-170 3.60 43 Lewis & Clark Stempla Jay Gould MinBlMiII&ite 25-500 3.10 44 Bros-. Winston Chartarn 04-501 2.85 45 Jefferson Basin Josephine 22-031 2.55 46 Lewis & Clark Rimini Quaansbury 2S-262 2.40 47 Cassade Neihart Snow Craak Millsite 07-005 1.60 46 Granite Alps Argo 20-081 1.00 49 Cascade Neihart Rebellion Mine (Upper & Lower) 07-157 0.60 50 Lewis & Clark Rimini Monitor Creek Tailings 2S-503 0.75 51 Beaverhead Lemhi Thorium City 01-500 0.00 52 Mineral st. Regis Gold Chrome 31-037 0.00 53 Madison Pony Chicago Mining Corp. Pony Mill 29-500 0.00 54 Broa_ Winston Aurora Millsite 04-500 0.00 55 Lewis & Clark Helena Josyln Street Tailings 25-501 0.00 66 Cascade Neihart Hutchinson 07-177 0.00 57 Lewis & Clark Rimini Bear Gulch 25-504 0.00 66 Missoula Copper Cliff Frogs Diner 32-027 0.00 59 Jefferson Elkhom Trumley Heap Leach 22-001 0.00 60 Lewis & Clark Rimini Peter 25-259 0.00 61 Park New World Great Republic Smeftar 34-000 0.00 62 Judith Basin Yooo RoncorfAmax SaDDhire 23-501 0.00

TABLE 4-2: 1994 ABANDONED HARDROCK MINES PRIORITY SITES SAFTEY RANKING

4-3

•

•

•

5.0 SITE SUMMARY FORMS

The following section presents a one page summary sheet for each of the 62 sites investigated during the 1994 inventory. Each summary sheet provides the site name, location, and other geographic information; and investigation details and summary of findings. Analytical data obtained at each site is summarized on the back of each summary sheet.

SAMPLE DESIGNAIION LEGEND

GW: Groundwater sample from well, spring, shaft, or adit discharge.

SW: Surface water sample from stream, river, or ditch.

AD: Adit discharge.

SE: Stream sediment sample.

TP: Mill tailings sample from tailings pond or pile, or streamside tailings deposit.

WR: Waste rock sample from waste rock dump .

SS: Background soil sample .

•

•

•


HAZARDOUS MATERIALS INVENTORY SITE SUMMARY

Mine/Site Name:,-LTuru!SeuB.!!lyue2-_____ _ County: Beaverhead Legal Description: T 3S R 11W Section(s): SW 1/4, NE 1/4, Section 2

Mine Type: Millsite/Ag, Pb, Au Primary Drainage: Trapper Creek

Mining District: HeclaNjpond Park Latitude: N 45 0 36' 18" Longitude: W 112 0 55' 42" USGS Code:---'-'10""0,.,2"'00""04l:L. _____ -'-_ Land Status:-LP.llriv.!..!a""te"'-_______ _ Secondary Drainage: Spring Creek Quad: Mount Tahepia Date Investigated: August 1. 1994 Inspectors: Bisch, Flammang, West Organization: Pjoneer Technical Services, Inc.

P.A. # 01-138

• The volume of tailings observed at the site was estimated to be 5,860 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 81.4 to 85.7 mg/kg Arsenic: 142J to 3,030J mg/kg Cadmium: 37.9J to 293J mg/kg Copper: 767 to 8,970 mg/kg Mercury: 2.96JX to 90.4JX mg/kg Lead: 7,780 to 38,400 mg/kg Antimony: 114J to 1,420J mg/kg Zinc: 12,800 to 34,000 mg/kg

• The volume of waste rock observed at the site was estimated to be 1,350 cubic yards. The waste rock was sampled for XRF analysis only due to the coarse nature of the material in conjunction with well established vegetation on the dumps. The following elements were elevated at least three times background: Copper: 337 mg/kg Iron: 66,247 mg/kg Manganese: 3,794 mg/kg

• An unnamed tributary to Sappington Creek flows adjacent to the site on the north side; observed releases to the tributary (sediment) were documented for silver, arsenic, and cadmium.

• No MCLs were exceeded in the tributary; however, the chronic aquatic life criteria for ' mercury was exceeded in both the upstream and downstream samples, and the chronic aquatic life criteria for lead was exceeded in the upstream sample.

• A spring emanating from near the foot of the mill was sampled during the investigation.

•

The EPA action level for lead and the acute and chronic aquatic life criteria for copper, lead, and zinc were all exceeded in the spring sample.

Potential safety hazards observed at the site included the collapsing mill building (which is a very large structure) and several collapsing cabins.

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Mine/Site Name:----LT=ho"'r.':'iu':'m=--"C":'ity'!-___ ----legal Description: T 10S R 15W

County: Beaverhead Section(s): NE 1/4. NW 1/4, Section 28:

Mining District:--L<Le5<!m.lli!Jhil...-_______ _ NW 1/4, NE 1/4. Section 28 latitude: N 45 0 57' 05" Mine Type: HardrocklThorium longitude: W 1130 27' 10" Primary Drainage: Horse Prairie Creek land Status:-:-'::P .. ub .... l.."ic'--_______ _ Quad: lemhi Pass

USGS Code:_1.L>0""'0""2""00""'0!.,11~_=___:_ ___ -_:_-Secondary Drainage: North Frying Pan Creek

Inspectors:-'-l!Nu./A.>-_________ _ Date Investigated:,--'-'N""/A:>.-_______ _ Organization: Pioneer Technical Services. Inc. PA # 01-500

• A site visit was not conducted as part of the 1994 inventory for the site. Part of the site was inventoried in 1993 under the South Frying Pan Creek site (01-211). Additional data were previously collected at the site by the Bureau of land Management while conducting a Preliminary Assessment in 1986.

• No mill tailings were observed at the site.

• The volume of radioactive waste rock observed at the site was estimated to be 300 cubic yards. The contamination consists of gross radiation (2 to 4 mRem/Hr). The following radioactive isotopes were elevated in the waste rock at the indicated concentrations (1986 BlM data): Thorium-228: 18 ± 2 pCi/g Gross Alpha: 93 ± 16 pCi/g Thorium-230: 0.18 ± 0.11 pCi/g Gross Beta: 75 ± 4 pCi/g Thorium-232: 14 ± 2 pCi/g lead-210: 0.93 ± 0.17 pCi/g Thorium-234: 24 ± 2 pCi/g

• No discharging adits, filled shafts, seeps, or springs were observed at the site during the investigation.

• No radioactive isotopes were elevated in nearby surface water (South Frying Pan Creek) .

5-2

•

•

•



Mine/Site Name:,_B""uwlli""on........,Kw.in .... gL--____ _ Legal Description: T 7N R 1W Min i ng District--,-,-I n",dl!<ia!Ln.....,C""r",e""en.k _____ _ Latitude: N 46 0 22' 12" Longitude: W 111 0 42' 12" Land Status:--,LPuriv"'a ... te"'-_______ _ Quad: Giant Hm Inspectors: Tuesday, Belanger. Clark, West Organization: Pioneer Technical Services, Inc.

• No nim tailings were observed at the site.

County: Broadwater Section(s): SE 1/4, SE 1/4, Section 10: NW 1/4, NW 1/4, Section 14: NE 1/4, NE 1/4, Section 15 Mine Type: HardrocklAg, Pb, Au Primary Drainage: Missouri River USGS Code:_1...,0..,,0""3><.01...,0 .... 1 ______ _ Secondary Drainage: Indian Creek Date Investigated: June 20, 1994 P.A. # 04-081

• The volume of waste rock observed at the site was estimated to be 6,745 cubic yards. The following elements were elevated to at least three times the background concentrations: Arsenic: 3,190 mglkg Copper: 91.5 to 1,320 mglkg Manganese: 37,100 mglkg Zinc: 350J to 1,070J mglkg

Cadmium: 11.8J mg/kg Mercury: 0.98JX to 1.51JX mglkg Lead: 8,160 to 47,900 mglkg

• One discharging adit was observed at the site during the investigation. The discharge flowed approximately 200 feet before seeping into the ground. No MCLs were exceeded in the adit discharge; however, the acute and chronic aquatic life criteria for cadmium, copper, and zinc were exceeded in the adit discharge. Additionally, the chronic aquatic life criteria for mercury and lead were exceeded in the adit discharge.

• No significant sources of surface water were on or near the site.

• Potential safety hazards observed at the site included two unstable trenches and one caved shaft with steep slopes .

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Mine/Site Name: Custer Millsite Legal Description: T 8N R 1W Mining District:.-LWuinu,;s;uto!o!JnLL-______ _ Latitude: N 46 0 26' 48" Longitude: W 111 0 39' 59" Land Status:-'-Pllriv ... a ... te"--_______ _ Quad: Winston Inspectors: Tuesday, Belanger. Clark, West Organization: Pioneer Technical Services, Inc.

County: Broadwater Section(s): SE 1/4. Section 13 Mine Type: HardrocklAu. Pb. Zn Primary Drainage: Missouri River USGS Code:--':-'10""0""3,,.,01.!..!0...,1_-=-----=---:-: __ _ Secondary Drainage: Iron Age Gulch Date Investigated: June 22. 1994 P.A. # 04-006

• The volume of tailings observed at the site was estimated to be 22,960 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 5.5 mg/kg Nickel: 13.8 mg/kg Arsenic: 535 mg/kg Lead: 507 mg/kg Cadmium: 8.6J mg/kg Zinc: 1,640J mg/kg Chromium: 17.7 mg/kg Manganese: 2,810 mg/kg

• No waste rock was observed at the site.

• No discharging adits, filled shafts, seeps, or springs were observed at the site during the investigation; however, a groundwater monitoring well was sampled. No MCLs were exceeded in the well sample.

• No surface water or sediment samples were collected during the investigation due to the extended distance to the nearest surface water and the lack of a direct runoff route.

• Potential safety hazards observed at the site included a highwall located above the mill foundation.

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Mine/Site Name:--L.>K .... le"'-in"'s""ch.u.mllJil>d.dt"--____ _ County: Broadwater legal Description: T ·7N R 1W Section(s): SW 1/4 NE 114, Section 3

Mine Type: Hardrock/Au, Pb, Zn, Ag Primary Drainage: Missouri River

Mining District_W'::ll'in:'-'s.",to..anL-______ _ latitude: N 46 0 23' 25" longitude: W 111 0 42' 45" USGS Code:-1.!1 0~Ol!O3!l.10'-l.1 0\l.1L-______ _ land Status:-LPu:riv!!.Sa...,te"--_______ _ Secondary Drainage: Whitehorse Creek Quad: Winston Date Investigated: July 21, 1994 Inspectors: Flammang, Clark, West Organization: Pioneer Technical Services, Inc.

P.A. # 04-010

• The volume oftailings observed at the site was estimated to be 1,210 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 111 mg/kg Manganese: 3,030 mg/kg Arsenic: 8,030 mg/kg lead: 12,100 mg/kg Cadmium: 8.8 mglkg Antimony: 56.9J mglkg Copper: 335JX mg/kg Zinc: 1,480JX mg/kg Mercury: 0.66J mg/kg

• The volume of waste rock observed at the site was estimated to be 8,685 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 28.5 to 61.2 mg/kg Arsenic: 1,760 to 4,180 mg/kg Cadmium: 2.9 mg/kg Mercury: 0.18J to 0.75J mg/kg lead: 5,070 to 6,840 mg/kg Zinc: 421JX to 534JX mg/kg


• Whitehorse Creek flows adjacent to the site on the south side. Observed releases to Whitehorse Creek were documented for silver, arsenic, copper, lead, and zinc. The MCl for arsenic and the EPA action level for lead were exceeded in the downstream sample. Additionally, the acute and chronic aquatic life criteria for copper, lead, and zinc were exceeded in the downstream sample. These exceedances were directly attributable to the site.

• Potential safety hazards observed at the site included several collapsing wooden structures (Ioadout and cabins) and several, relatively small, open pits and trenches .

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Mine/Site Name:...".,G=--o""ld""eLLn .cA!l;Ig2.e _____ _ legal Description: T 8N R 1W Mining District:_W.LL.!!in",s~to",:,n.L-______ _ latitude: N 46 0 24' 05" longitude: W 111 0 42' 42" land Status: Private/Public Quad: Winston Inspectors: Flammang, Clark, West Organization: Pioneer Technical Services, Inc.


County: Broadwater Section(s): SW 1/4, SE 1/4, Section 34 Mine Type: HardrocklAy, Pb, Zo, Ag Primary Drainage: Beaver Creek USGSCode:.~10~0~3~0~10~1~~~~ __ ___ Secondary Drainage: Weasel Creek Date Investigated: Jyly 21. 1994 P.A. # 04-050

• The volume of waste rock observed at the site was estimated to be 8,995 cubic yards. The following were elevated to at least three times the background concentrations: Silver: 15.6 to 17mg/kg Arsenic: 1,410t011,000mg/kg Cadmium: 6.3 mg/kg Copper: 180JX mg/kg Mercury: 1.47J mg/kg lead: 756 to 2,790 mg/kg. Zinc: 945JX mglkg

• Three discharging adits were observed at the site. The MCl for arsenic and the chronic aquatic life criteria for mercury and lead were exceeded in the Adit #1 discharge. The chronic aquatic life criteria for mercury was exceeded in the Adit #2 discharge.

• The flows from two of the discharging adits at the site (Adit #2 and Adit #3) combined to form the headwaters of Weasel Creek. No MCls were exceeded in Weasel Creek; however, the acute and chronic aquatic life criteria for zinc and the chronic aquatic life criteria for mercury and lead were exceeded.

• Potential safety hazards observed at the site included two open adits, a 15-foot highwall, and a 20-feet-deep open pit.

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Mine/Site Name: Sunrise/January County: Broadwater legal Description: T 8N R 1W Mining District:_W.LL!Jjnu..siUto><JnLL-___ ~---

Section(s): S 1/2, SW 1/4. Section 26 Mine Type: HardrocklCu, Pb, Zn, Ag, Au Primary Drainage: Beaver Creek latitude: N 46 0 24' 55"

longitude: W 111 0 41' 48" USGS Code:---,-,1 0""0,,,,3:><,0....,1 0"-'1'--_____ _ land Status: Prjvate/Public Secondary Drainage: Weasel·Creek Quad: Winston Date Investigated: August 5, 1994 Inspectors: Flammang, Clark, West Organization: Pioneer Technical Services, Inc.

P.A. # 04-130 & 04-126


• The volume of waste rock observed at the site was estimated to be 11,030 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 63.9J to 70.7J mg/kg Arsenic: 402 to 905 mg/kg Cadmium: 8.8 to 24.8 mg/kg Chromium: 17.9 mg/kg Copper: 489 to 515 mg/kg

Mercury: 0.21J to 0.63J mg/kg lead: 10,400 to 15,900 mg/kg Antimony: 42.8J mg/kg Zinc: 1,600 to 4,070 mg/kg

• Two discharging adits were associated with the site; both flows discharge to Weasel Creek. The MCls for cadmium and antimony and the acute and chronic aquatic life criteria for cadmium and zinc were exceeded in the Adit #1 discharge. Additionally, the chronic aquatic life criteria for copper and mercury were exceeded in the Adit #1 discharge. Only the chronic aquatic life criteria for mercury was exceeded in the Adit #2 discharge.

• Weasel Creek flows through the center of the site. An observed release to Weasel Creek was documented for zinc. The MCl for cadmium, as well as the acute and chronic aquatic life criteria, were exceeded in the downstream sample. These exceedances were directly attributable to the site. The acute and chronic aquatic life criteria for zinc and the chronic aquatic life criteria for mercury and lead were exceeded both upstream and downstream from the site.

• Potential safety hazards observed at the site included one small mine opening, a 30-foot highwall, and several collapsing structures .

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Mine/Site Name: Aurora Mine and Millsite Legal Description: T 8N R 1W Mining District_W.!.LIlin""s .. to ... n.L.-______ _ Latitude: N 46 0 26' 55" Longitude: W 111 0 39' 45" Land Status:-L.,P.uriv .... a ... te¥.-_______ _ Quad: Winston Inspectors: Tuesday, Belanger, Clark, West Organization: pioneer Technical Services, Inc.

County: Broadwater Section(s): SE 1/4. NE 1/4. SW 1/4 Section 13 Mine Type: HardrockiAu. Ag. Pb Primary Drainage: Missouri River USGS Code:_1.!,!0""0",,3,,,,0...,1 0 .... 1'--______ _ Secondary Drainage: Iron Age Gylch Date Investigated: June 22. 1994 P.A. # 04-500

• The only evidence that any mining activity occurred at this site was the existence of a single, open (and potentially hazardous) adit. No tailings or milling equipment were found. A mill claim may have been placed on the property; however, observations indicated that a mill was never constructed or operated at the site.

• No soil or water samples were collected at the site due to the lack of contaminant sources .

5-8

•

•

•

MONTANA DEPARTMENT OF STATE LANDS . ABANDONED MINE RECLAMATION BUREAU


Mine/Site Name:_C""':"hai!!.rt .... awm.1...-_____ _ legal Description: T BN R 1W Mining District:~WLlJinLJ.ls~to~nu-------_ latitude: N 46 0 26' 52" longitude: W 111 0 39' 45" land Status:,--L.PllrivJ!ja;ut ... e ________ _ Quad: Winston Inspectors: Tyesday, Belanger. Clark, West Organization: pioneer Technical Services, Inc.


County: Broadwater Section(s): Sections 13 and 24 Mine Type: HardrocklAg, Au Primary Drainage: Missouri River USGS Code:--L!1 0""0""3:!o!.01.!.!0L.!1 ______ _ Secondary Drainage: Iron Age Gulch Date Investigated: June 22, 1994 P.A. # 04-501

• The volume of waste rock observed at the site was estimated to be 10,690 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 3.B to 23 mg/kg Cadmium: 4B.OJ to 55.0J mg/kg Mercury: 0.34JX to 2.12JX mg/kg lead: 109 to 8,070 mg/kg

Arsenic: 1,740 to 10,300 mg/kg Copper: 169 to 515 mg/kg Manganese: 4,580 mg/kg Zinc: 3,030J to 7,630J mg/kg


• Miller Gulch flowed directly through the center of the site. An observed release to Miller Gulch was documented for mercury. Also, the MCl for mercury and the acute and chronic aquatic life criteria for mercury were exceeded in the downstream sample. These exceedences were directly attributable to the site.

• Potential safety hazards observed at the site included one open adit and a large, open pit .

5-9

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Mine/Site Name:-,B!.<JrL!<o,...ad~wwaB.lt~erL-____ _ County: Cascade legal Description: T 14N R 8E Mining District-llN .... elw·h!li!aurt _______ _

Section(s): NE 1/4, SE 1/4, Section 32 Mine Type: HardrocklAu, Ag, Cu, Pb, Zn

latitude: N 46 0 56' 03" Primary Drainage:--,=,B .... el!!.t .,.C"'re ... e..,k'--____ _ longitude: W 110 0 43' 27" USGS Code:-,:-,1 0""0""3 .... 01J..l0",,5'-:-_____ _ land Status:-'-Pllriv"'a,..te"'-_______ _ Secondary Drainage:...,.B""e""le>...t ",C...,re ... e",k~ ___ _ Quad: Neihart Date Investigated: July 12, 1994 Inspectors: Tuesday, Bisch, West Organization: Pioneer Technical Services, Inc.

PA # 07-079


• The volume of waste rock Observed at the site was estimated to be 41,200 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 34.8JX to 92.8JX mg/kg Barium: 599 to 683 mg/kg Copper: 58.1 to 105 mg/kg Manganese: 8,700 to 10,600 mg/kg lead: 4,380 to 7,420 mg/kg Zinc: 5,360 to 5,710 mg/kg

Arsenic: 174J to 224J mg/kg Cadmium: 25.8 to 28.7 mg/kg Mercury: 0.52J to 1.09J mg/kg Nickel: 45.6 mg/kg Antimony: ·14.3J to 23.3J mg/kg

• One discharging adit was observed at the site during the investigation. The discharge flowed a short distance over a waste rock dump and eventually seeped into the dump. The MCls for cadmium and antimony and the acute and chronic aquatic life criteria for cadmium and zinc were exceeded in the adit discharge.

• A surface water sample was collected from a flowing stream that emanated at the foot of the mine's lowermost waste rock dump. The MCl for cadmium and the acute and chronic aquatic life criteria for zinc were exceeded in the stream. Additionally, the chronic aquatic life criteria for cadmium was exceeded in the stream.

• Potential safety hazards observed at the site included an open adit with an unsecured chain-link fence placed at the entrance and two collapsing wooden loadout structures.

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Mine/Site Name:_Hw.a""rt"'le..,yJ--______ _ County: Cascade Legal Description: T 14N R 8E Section(s): NE 1/4. NE 1/4. Section 32

Mine Type: HardrocklAg. Pb. Zn Mining District:--'-l!N.s<ewihl5!aurt _______ _ Latitude: N 46° 56' 17" Primary Drainage:-Io!B.s<ell1.t ~CU,,!re;cse<.Ck,--____ _ Longitude: W110043'41" USGS Code:-,:,1 0",0,-"3,,,,0-,,1 O""S"-__ :---::-'C"'-:-__

Secondary Drainage: Compromise Gulch Land Status:,-'-P.Llrjv.!..!a .... t,...e ________ _ Quad: Neihart Date Investigated :--""Ju ... n..!.>e'-'8 .... ~1 .... 9"'94:::L-____ _ Inspectors: Tuesday. Belanger. Clark. West Organization: pioneer Technical Services. Inc.

P.A. # 07-082

• The volume of tailings observed at the site was estimated to be 255 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 105J mg/kg Manganese: 13.800J mg/kg Arsenic: 133 mg/kg Nickel: 48.9 mg/kg Barium: 658 mg/kg Lead: 13.900JX mg/kg Cadmium: 28.9JX mg/kg Antimony: 21.4J mg/kg Copper: 118J mg/kg Zinc: 6.650 mg/kg Mercury: 0.32 mg/kg

• The volume of waste rock observed at the site was estimated to be 21,860 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 64.1 J to 69.9J mg/kg Arsenic: 46.3 to 72.9 mg/kg Barium: 574 mg/kg Cadmium: 28.1 JX to 34.2JX mg/kg Copper: 64.2J to 266J mg/kg Mercury: 1.66 mg/kg Manganese: 3,570J to 7.970J mg/kg Nickel: 35.7 mg/kg Lead: 3,260JX to 6,270JX mg/kg Zinc: 6,310 to 8,490 mg/kg


• Intermittent Compromise Gulch passes through the center of the site. Compromise Gulch was dry throughout most of the site during the investigation; however. water was flowing near the lower (southeast) boundary. Observed releases to Compromise Gulch (sediment) were documented for arsenic. manganese. lead, antimony. and zinc. No MCLs were exceeded in the downstream surface water sample; however, the acute and chronic aquatic life criteria for zinc and the chronic aquatic life criteria for lead were exceeded .

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Mine/Site Name: Queen of the Hills Legal Description: T 14N R 8E

County: Cascade Section(s): SE 1/4, SW 1/4, Section 29 Mine Type: Hardrock/Ag. Pb, Zn Mining District:-L.!N,..ewih""a .... rt _______ _

Latitude: NA6° 56' 19" Primary Drainage:_B,.e ... lt .,.C""re..,e""k'--____ _ Longitude: W 110 0 44' 25" USGS Code: 100301015 Land Status:--'--Puriv"'a ... te"'--_______ _ Secondary Drainage: Rock Creek Quad: Neihart Date Investigated: June 8 and 10, 1994

PA # 07-085 Inspectors: Tuesday, Belanger. Clark, West Organization: Pioneer Technical Services, Inc.

• No mill tailings were observed at the site. Tailings from this mill may have been disposed of at the Neihart Tailings site (07-154) located approximately 1/4 mile downstream on BeH Creek.

• The volume of waste rock observed at the site was estimated to be 54,640 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 21.8J to 95.8J mgJkg Arsenic: 43.1 to 683 mglkg Barium: 545 to 753 mgJkg Cadmium: 11.4JX to 90.4JX mgJkg Copper: 75.4J to 229J mg/kg Mercury: 0.26 to 0.44 mgJkg

Manganese: 4,410J to 32,800J mgJkg Nickel: 34.7 mg/kg Lead: 1,81 OJX to 13,900JX mg/kg Antimony: 21.8J to 40.1 J mgJkg Zinc: 2,580 to 21,000 mg

• One discharging adit that seeped into waste rock after flowing a short distance was observed at the site. No MCLs were exceeded in the adit discharge; however, the acute and chronic aquatic life criteria for zinc were exceeded.

• No surface water or sediment samples were collected during the investigation due to the extended distance to the nearest surface water (Rock Creek) and the lack of a direct runoff route.

• Potential safety hazards observed at the site included three open ad its and several collapsing structures.

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• No mill tailings were observed at the site,

County: Cascade Section(s): NW 1/4, NW 1[4, Section 15 Mine Type: HardrockIPb, Zn, Ag Primary Drainage:_B""e""I'"-t ~CCLlire.,.e",k~ ____ _ USGS Code:_1...,0""0""30 .... 1...,0""5'--_____ _ Secondary Drainage: Sqyaw Creek Date Investigated:""J .... u .... n ..... e"'6"",...J1"'9""94=<-____ _ PA # 07-144

• The volume of waste rock observed at the site was estimated to be 520 cubic yards, The following elements were elevated to at least three times the background concentrations: Silver: 16,2J mg/kg Manganese: 2,430J mg/kg Arsenic: 35,9 mg/kg Lead: 8,460JX mg/kg Cadmium: 52,2JX mg/kg Antimony: 20,2J mg/kg Copper: 1,210J mg/kg Zinc: 14,200 mg/kg

• No discharging adits, filled shafts, seeps, or springs were observed at the site during the investigation,

• Squaw Creek flows through the center of the site, Observed releases to Squaw Creek (sediment) were documented for arsenic and copper.

• MCLs for cadmium, copper, nickel, and antimony, as well as the EPA action level for lead, were exceeded in Squaw Creek both upstream and downstream from the site, Flow in Squaw Creek originates at the discharge from the Silver Dyke Adit (07-135), Additionally, acute and chronic aquatic life criteria for cadmium, copper, lead, and zinc were exceeded in Squaw Creek both upstream and downstream from the site,

• Potential safety hazards observed at the site included a collapsing load out structure and an unstable slope located above a caved adit.

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Mine/Site Name: Rebellion (Upper & lower:) legal Description: T 14N R 8E

County: Cascade Section(s): SW 1/4, NW 1/4, Section 27:

Mining District:-L:!N"'ewih"'aurt--:-:----:-_----:-___ _ latitude: N 46° 56' 53": N 46° 57' 00" longitude: W 110° 42' 13": W 110° 42' 00" land Status:-'-P'-'riy...,a .... te"'-_______ _ Quad: Neihart Inspectors: Tuesday, Belanger. Clark, West Organization: Pioneer Technical Services, Inc.


NW 1/4, NW 1/4, Section 27 Mine Type: Hardrock/Ay Ag Pb Zn Primary Drainage:-"'B"..el .... t .,.C:.Llre..,e..,k'--____ _ USGS Code:--I..l1 0 ... 0""3><.01...,0..,.5'--_____ _ Secondary Drainage: Snow Creek Date Investigated:_J...,ywn..."e...,9 ... ,....J1 .... 9""9""4 ____ _ PA # 07-157 & 07-158

• The volume of waste rock observed at the site was estimated to be 64,920 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 7.9J to 98.7J mg/kg Arsenic: 53.9 to 181 mg/kg Barium: 345 to 401 mg/kg Cadmium: 10.1 JX to 12.8JX mg/kg Copper: 64.0J to 117J mg/kg

Mercury: 0.34 to 0.48 mg/kg lead: 713JX to 3,090JX mg/kg Manganese: 7090J mg/kg Zinc: 536 to 2,950 mg/kg

• Three discharging adits were associated with the site. The MCl for cadmium and the acute and chronic aquatic life criteria for cadmium, copper, and zinc were exceeded in all three adit discharges. The EPA action level for lead, as well as the acute and chronic aquatic life criteria for lead, were exceeded in the two adit discharges associated with the upper portion of the Rebellion Mine.

• The three adit discharges eventually merged to form the headwaters of a tributary to Snow Creek. A surface water sample was collected from this tributary downstream from the site. The MCl and the acute and chronic aquatic life criteria for cadmium were exceeded in the sample. Additionally, the acute and chronic aquatic life criteria for copper and zinc and the chronic aquatic life criteria for lead were exceeded in the sample.

• Potential safety hazards observed the site included several collapsing structures (two loadout structures and two collapsing sheds) .

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Mine/Site Name:--'..>R""jp .... P'!SleuMwu.inlSie;;z.s _____ _ County: Cascade Legal Description: T 14N R 8E Mining District:--,-:,N~elLih ... a,,-,rt~ ______ _ Latitude: N 46 0 56' 43"

Section(s): NE 1/4 SW 1/4. Section 27 Mine Type: HardrocklAg Au, Pb, Zn Primary Drainage:~Be""l,,::t ,!",C"->re",,e<Llk~ ____ _

Longitude: W 1100 41' 52" USGS Code:_1",,0""'0""3,.,01...,,0""'5'--_____ _ Land Status:--LPllrjVr..saill>teiO-_______ _ Secondary Drainage: Snow Creek Quad: Neihart Inspectors: Tuesday. Belanger. Clark, West Organization: Pjoneer Technical Services, Inc.

Date Investigated:_J...,u .... n.!Se'-7 ..... ..J1Ui9~9::!.4 ____ _ P.A. # 07-163


• The volume of waste rock observed at the site was estimated to be 6,100 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 77 J to 105J mglkg Arsenic: 391 to 687 mglkg Barium: 459 mglkg Cadmium: 8.47 JX mglkg

Copper: 89.3J to 184J mglkg Mercury: 0.83 to 1.12 mglkg lead: 6,270JX to 6,920JX mglkg Zinc: 515 to 1,670 mglkg

• There were four discharging adits observed at the site during the investigation; however, none of the flows reached a flowing surface water source. The MCLs for arsenic and cadmium were exceeded in the Adit #1A discharge; and the MCl for cadmium was exceeded in the Adit #3 discharge. The acute and chronic aquatic life criteria for zinc were exceeded in all four discharges; and the acute and chronic aquatic life criteria for cadmium and copper were exceeded in all discharges except Adit #2. Additionally, the chronic aquatic life criteria for lead was exceeded in all of the discharges.

• The surface water sample collected below the site exceeded the Mel for cadmium. The acute and chronic aquatic life criteria were exceeded for cadmium, copper, lead, and zinc, as well as the chronic aquatic life criteria for iron.

• Potential safety hazards observed at the site included three open adits, a collapsing loadout structure, and a collapsing cabin.

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Mine/Site Name: lexington No.4 legal Description: T 14N R 8E

County: Cascade

Mining District:_Nl..1><Jeil!.!h..,artL>-_______ _ Section(s): SW 1/4, NE 1/4, Section 28 Mine Type: Hardrock/Ag, Pb, Ay

latitude: N 46° 56' 50" longitude: W 110° 42' 35"

Primary D~ainage :-:-",Be..,l,,::t ""C""re""e""k'--____ _ USGS Code:_l...,0""0""3,..01...,,0""5c.-_____ _

land Status:--L.PlldV ... a..,te'"-_______ _ Secondary Drainage: Snow Creek Quad: Neihart Inspectors: Tuesday, Belanger, Clark, West Organization: pioneer Technical Services, Inc.

Date Investigated:_J>l.Jy""nlSe'-'9"",....J1Ul9~94::L-____ _ P.A. # 07-167


• The volume of waste rock observed at the site was estimated to be 6,600 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 18.9J mg/kg Arsenic: 316 mg/kg Cadmium: 10.8JX mg/kg Copper: 46.8J mg/kg

Mercury: 0.19 mg/kg lead: 2,410 mg/kg Zinc: 2,850 mg/kg

• One discharging adit was observed at the site during the investigation; however, the adit did not reach a surface water source. The MCl for cadmium and the acute and chronic aquatic life criteria for cadmium, copper, lead, and zinc were exceeded in the adit discharge.

• Potential safety hazards observed at the site included a collapsing shed and several unstable, steep slopes associated with the waste rock dumps and caved adit.

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Mine/Site Name:,-,-,H~ut",c ... h!!.in!S!s"",onL.L..-_____ _ Legal Description: T 14N R 8E Mining District:~N",:eILLJ'h:",:a,:,rt _______ _ Latitude: N 46 0 57' 33" Longitude: W 1100 42' 09" Land Status:-'-P..."riv .... a .. te"'--_______ _ Quad: Neihart Inspectors: Tyesday, Belanger. Clark, West Organization: Pioneer Technical ServiceS, Inc.


County: Cascade Section(s): NW 1/4. SW 1/4. Section 22 Mine Type: HardrocklUnknown Primary Drainage:-",B""el!l..t ~CCI.!re;ose<llk,--____ _ USGS Code:-Ll10""0""3.!o!,01J.,!0.,.5!...-_____ _ Secondary Drainage: Snow Creek Date Investigated:->I.!Ju"'n.!5eL7L".-l1Uii9!,;i!9::t4 ____ _ P.A. # 07-177

• The volume of waste rock observed at the site was estimated to be 130 cubic yards; however, the waste rock was not sampled due to the small volume involved and the fact that the dump was fully vegetated and was not located in a drainage.

• One discharging adit was observed at the site during the investigation. No MCLs were exceeded in the adit discharge; however, the acute and chronic aquatic life criteria for cadmium, copper, and zinc were exceeded. The adit discharge seeped into the ground before reaching surface water.

• Snow Creek flows adjacent to the site on the southside. No surface water or sediment samples were collected from Snow Creek since the waste rock was not located in the drainage and there was not direct runoff route to surface water.

• No hazardous mine openings or structures were Observed at the site.

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Mine/Site Name: Snow Creek Millsjte Legal Description: T 14N R 8E

County: Cascade Section{s): SE 1/4, NW 1/4, SW 1/4, Section 21 Mine Type: Cyanide Mill/Au, Ag Mining District_N!..!.2ei!!..!h,..art'-'-_______ _

Latitude: N 46° 57' 30" Longitude: W 110° 43' 10" Land Status:--'-P .. ub"'l ..... jc'--_______ _ Quad: Nejhart Inspectors: Tuesday, Bisch, West Organization: Pioneer Technical Services, Inc.

Primary Drainage:-""-Be",,l,,-t ""'C,.,re""e...,k'--____ _ USGS Code:_l.u0..,.0""'3><.01.u0.,.5'::-_-::----:-:=-_--:-Secondary Drainage: Snow Creek/Car:penter Creek Date Investigated: Jyly 11, 1994 P.A. # 07-505

• The volume of mill tailings observed at the site was estimated to be 183 cubic yards; approximately 25 percent of the tailings were contained in a wooden vat. The following elements were elevated to at least three times the background concentrations: Silver: 78.6JX mg/kg Lead: 962 mg/kg Copper: 61.7 mg/kg Antimony: 55.7 J mg/kg Mercury: 0.24J mg/kg Zinc: 775 mg/kg

• No waste rock dumps were observed at the site.

• Snow Creek flows adjacent to the site on the southwest side. No MCLs were exceeded in Snow Creek; however, acute and chronic aquatic life criteria for zinc were exceeded in both the upstream and downstream samples. Additionally, the acute and chronic aquatic life criteria for cadmium were exceeded in the downstream sample.

• Potential safety hazards observed at the site included several collapsing wooden structures (cabins and mill building) and abundant wood and metal debris.

5-18

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Mine/Site Name: Gilt Edge Tailings Legal Description: T 16N R 20E Mining District: Warm Springs Latitude: N 41' 07' 53"

County: Fergus Section(s): SW 1/4, SW 1/4, Section 17: SE 1/4, SE 1/4, Section 20 Mine Type: Millsite/Au, Ag, Pb, Cy Primary Drainage: Chippewa Creek Longitude: W 109 0 12' 29"

Land Status: private/Public USGS Code:---,"1 01Ll0""4""0 .... 20""4:L-______ _ Quad: Jydith Peak Secondary Drainage: Ox Frame Gulch/

Chippewa Creek Inspectors: Tuesday, Bisch, West Organization: pioneer Technical Services Inc, Date Investigated: July 14, 1994

P.A. # 14-008

• The volume of tailings observed at the site was estimated to be 69,860 cubic yards. This volume includes a previously reclaimed tailings pond (located near the headwaters of Chippewa Creek at the Gilt Edge Mine), as well as an uncontained tailings pile located near the small community of Gilt Edge (approximately 1.5 miles downstream from the Gilt Edge Mine). The following elements were elevated to at least three times the background concentrations: Arsenic: 928J mg/kg Antimony: 21. OJ to 128J mg/kg Mercury: 2.23J mg/kg to 4.50J mg/kg

• A domestic well was sampled in the town of Gilt Edge downgradient of TP-2. No MCLs were exceeded in this groundwater sample.

• The headwaters of Chippewa Creek are located at the Gilt Edge Mine, and the creek flows adjacent to the large, uncontained tailings pile located downstream. Observed releases to Chippewa Creek (sediment) were documented for arsenic and mercury.

• No MCLs were exceeded in Chippewa Creek; however, the chronic aquatic life criteria for mercury was exceeded in the downstream sample. This exceedence was directly attributable to the site.

• Two, potentially hazardous, mine openings (adits) were observed in the mine area. Additional safety hazards at the site included two elevated, large metal vats and a wooden load out structure located near the lower tailings pile.

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Mine/Site Name: Western Mine and Millsjte Legal Description: T 16N R 19E Mining District: Warm Springs Latitude: N 47" 10' 11": N 47 0 10' 07" Longitude: W 109 0 17' 15": W 109 0 16' 37" Land Status:-'-P.urjv ..... a ... te"'-_______ _ Quad: New Year Inspectors: Tuesday, Bisch. West Organization: pioneer Technjcal Servjces. Inc.

County: Fergus Section(s): NE 1/4. NW 1/4, Sect jon 11: NW 1/4, NW 1/4, Section 11 Mine Type: Hardrock: Millsite/Au Primary Drainage: Warm Springs Creek USGS Code:--Ll1 0""04=><.01...,0""3'--_____ _ Secondary Drainage: Devils Canyon/Muskrat Creek Date Investigated: July 13, 1994 P.A. # 14-023 and 14-030

• Although evidence of two separate mill structures were observed at the site, no mill tailings were found.

• The volume of waste rock observed at the site was estimated to be 1,030 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 3.6JX to 124JX mg/kg Antimony: 67.4J to 7B.2J mglkg Mercury: 1.16J to 2.12J mg/kg


• An unnamed intermittent tributary to Devil's Canyon (dry during investigation) is located within approximately 20 feet of waste sources at the site; however, no sediment samples were collected from the tributary due to the very stable condition of the drainage (extremely heavy vegetative cover), the general lack of sediment, and the lack of a defined channel.

• Potential safety hazards observed at the site included four open adits and a large, unstable loadout structure.

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Mine/Site Name:....L..p.."re"'s""te ... r .... J""ollhn"--____ _ County: Fergus Legal Description: T 16N R 20E Mining District: Warm Springs Latitude: N 47" 07' 4.6 Longitude: W 109 0 14' 30.5 Land Status: Private/Public Quad: Judith PeaklHorsethief CoYlee West Inspectors: Tyesday, Bisch, West Organ1zation: pioneer Technical Services, Inc.

Section(s): S 112, SW 1/4, Section 30 Mine Type: Hardrock/Ay Primary Drainage: Chippewa Creek USGS Code:.-,-,l 0 .... 0""4""0:&.20><:4L-______ _ Secondary Drainage: Soyth Fork of Chippewa Creek Date Investigated: Jyly 15, 1994 P.A. # 14-090

• The volume of mill tailings observed at the site was estimated to be 20,835 cubic yards.

•

The following elements were elevated to at least three times background concentrations: Arsenic: 1,430J mg/kg Antimony: 45.0J mg/kg Barium: 598 mg/kg Zinc: 199 mg/kg Mercury: 3.26J mg/kg

The volume of waste rock observed at the site was estimated to be 3,870 cubic yards. The following elements were elevated to at least three times background concentrations: Arsenic: 781 mg/kg Mercury: 0.98J mg/kg Barium: 481 mg/kg

• No discharging ad its, filled shafts, seeps, or springs were observed at the site during the investigation.

• The entire volume of tailings associated with the site are situated directly in an intermittent, unnamed tributary to the south fork of Chippewa Creek (dry during investigation). The tailings extend for more than 112-mile downstream along the drainage. Observed releases to the tributary (sediment) were documented for arsenic, mercury, barium, and antimony. .

• Potential safety hazards observed at the site included two open adits (previously gated, but subsequently broken into), a fenced shaft, and a relatively large, open pit.

5-21

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Mine/Site Name:~A~rg,.,.o,--_--=---:--:-:-:--:--__ _ legal Description: T 10N R 16W Mining District:_AOl/olp",s~ _______ _ latitude: N 46 0 34' 50" longitude: W 113 0 34' 10" land Status:-LPurivl!.5a ... te"--_______ _ Quad: Spink point Inspectors: Tyesday Belanger. West Organization: pioneer Technical Services, Inc.

County: Granite Section(s): SW 114. NE 1/4, Section 35 Mine Type: HardrocklAy, Ag Primary Drainage: Clark Fork River USGS Code:_1.u7:.><Ou1.!lo02"-loOu1 ______ _ Secondary Drainage: Harvey Creek Date Investigated:_J!oI.Ju.uIY1-.JJ.6~, 1,Ll9...,9l:l4'--____ _ P.A. # 20-081

• The volume of tailings observed at the site was estimated to be 10 cubic yards. The following elements were elevated to at least three times the background concentrations:

•

Barium: 2,840 mg/kg lead: 460 mg/kg Mercury: 0.29J mg/kg

The volume of waste rock Observed at the site was estimated to be 1,700 cubic yards. The following element was elevated to at least three times the background concentrations: Mercury: 0.33J mg/kg

• One discharging adit was associated with the site. The MCl for antimony and the chronic aquatic life criteria for lead were exceeded in the adit discharge.

• Harvey Creek flows adjacent to the site on the southwest side. No observed releases to Harvey Creek were documented. The acute and chronic aquatic life criteria for cadmium were exceeded in the downstream sample, although not attributable to this site.

• Potential safety hazards observed at the site included one open adit.

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Mine/Site Name:---L!.Mwil""le""rsowMuw.in..,.e'--____ _ Legal Description: T 3N R 17W Mining District:_Fwr'-"'o~g..J.P....!oQ"-n""d ______ _ Latitude: N 46 0 01' 49" Longitude: W 113 0 40' 50" "Land Status:-'-P1.I.riv .... a ... te"'--_______ _ Quad: Whetstone Ridge Inspectors: Tuesday, Belanger. West Organization: Pioneer Technical Services, Inc.


County: Granite Section(s): NE 1/4, NW 1/4, Section 11 Mine Type: HardrocklAu, Ag, Cy, Pb, Zn Primary Drainage: Copper Creek USGS Code:-!-J17w.Ou1..><0""'20 .... 2 _________ _ Secondary Drainage:_L""y ... tz......".C"-'re""e..,k ____ _ Date Investigated:_J!oI.JYd.!IY1-L7~, 1.Jj9"'9l:l4L-____ _ PA # 20-176

• The volume of waste rock observed at the site was estimated to be 9,045 cubic yards. The following elements were elevated to at least three times the background concentrations: Cadmium: 17.1J to 29.5J mg/kg Copper: 274J to 473J mg/kg Arsenic: 68.6J to 92.3J mg/kg

Lead: 1,980 to 4,020 mg/kg Zinc: 2,020 to 2,570 mg/kg Mercury: 0.78J to 1.73J mg/kg

• A surface water sample was collected downstream from the site after flowing from a bog area. The MCl for cadmium and the acute and chronic aquatic life criteria for cadmium, copper, and zinc were exceeded in the sample.

• One discharging adit and two filled shafts were observed at the site during the investigation. No MCls were exceeded in the adit discharge; however, the acute and chronic aquatic life criteria for cadmium and zinc and the chronic aquatic life criteria for iron and lead were exceeded. The MCl for cadmium was exceeded in one of the shafts.

• Potential safety hazards observed at the site included three open shafts, a collapsing headframe, and two collapsing cabins.

5-23

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Mine/Site Name: Free Coin/Red Cloud legal Description: T 12N R 14W Mining District:.-:-",G",a"-,m..,,e~t~ ______ _ latitude: N 46° 49' 12" longitude: W 113" 20' 44" land Status:---Lpurivuallltei<-. _______ _ Quad: Elevation Mountain Inspectors: Bisch. Flammang. Clark, West Organization: pioneer Technical Services, Inc.

County: Granite Section(s): SW 1/4. SE 1/4, Section 3 Mine Type: Hardrock, Millsite/Au Primary Drainage :.--"'B""e""ar"""C""r.."e""e."k _____ _ USGS Code:---1.J17u,Ou1""'02..,OLJ1L---_____ _ Secondary Drainage: First Chance Gylch Date Investigated: Jyne 29, 1994 P.A. # 20-134

• The overall volume of mil! tailings associated with the site could not be determined during the investigation. Tailings were observed in several scattered and very small (shallow) pockets near the mil! building during the investigation. Additional tailings may be deposited at depth beneath the large waste rock dumps at the site; however, attempts to bore through the waste rock were unsuccessful.

e· The volume of waste rock observed at the site was estimated to be 22,325 cubic yards. The following elements were elevated to at least three times the background

•

. concentrations: Silver: 4.aJX mglkg Arsenic: 37.4J mg/kg Copper: 61.4J to 104J mg/kg

Mercury: 2.0a to 2.44 mg/kg lead: 137 to 171 mg/kg

• One discharging adit, which flowed directly into First Chance Gulch, was observed at the site. The MCl for antimony, as well as the chronic aquatic life criteria for lead, were exceeded in the adit discharge.

• First Chance Gulch flows into a constructed, lined pond located near the center of the site. The pond appeared to be part of a diversion structure which directs the flow underground (directly beneath the site). The stream re-emerges downstream from the lowermost workings at the site. No observed releases were documented, and no MCls or acute or chronic aquatic life criteria were exceeded in the stream.

• Hazardous mine openings observed at the site included four open adits and an open pit with a 30-foot highwal!. Additionally, the mil! building was in a state of collapse .

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Mine/Site Name:_Li .... tt ... le....,G ... e ... mw-_---,----,-__ _ Legal Description: T IN R 13W

County: Granite Section(s): NE 1/4, SW 1/4, Sect jon 30 Mine Type: HardrocklAg, Au, Pb, Zn Mining District:_P'-:-':'hjWjlip""s ... b .... u~rgl--_____ _

Latitude: N 46 0 19' 43" Primary Drainage:-:-C ..... am":""p""C""r ... ee""kll.-____ _ Longitude: W 1130 16' 22" USGS Code: 17010202 . Land Status:---'-Pll.rjv...,a .. te"'--_______ _ Secondary Drainage:-:-"'CJ1Jliffu....>ooG:"u ... lcwhL--___ _ Quad: Philipsbyrg Date Investigated:--,JlL!u.uIY1->l5~, 1.Li9;z,;9;!:l4t..-____ _ Inspectors: Flammang, Belanger, West Organization: pioneer Technical Services, Inc.

P.A. # 20-011

• The volume of tailings observed at the site was estimated to be 18,290 cubic yards. The following elements were elevated to at least three times the background concentrations:

•

Silver: 53 to 68.5 mg/kg Manganese: 29,600 mg/kg Cadmium: 15.1 mg/kg Lead: 903 to 2,890 mg/kg Copper: 145J mg/kg Zinc: 2,590 to 9,250 mg/kg

The volume of waste rock observed at the site was estimated to be 4,810 cubic yards. The waste rock was previously sampled during the 1993 Hazardous Materials Inventory as part of the Trout Mine (20-062) investigation. The following elements were elevated to at least three times the background concentrations: Cadmium: 9.8 mg/kg Zinc: 1,480 mg/kg Copper: 323 mg/kg


• Intermittent Cliff Gulch (dry during investigation) flows adjacent to the site on the north side. Sediment samples were collected from Cliff Gulch; however, no observed releases were documented due to upgradient impacts from the Trout site.

• Potential safety hazards observed at the site included one open adit, a collapsing headframe, and two collapsing wooden structures.

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Mine/Site Name: Wenger No.2 County: Granite Legal Description: T 7N R . 13W Section(s): SW 1/4, SW 1/4, Section 30

Mine Type: HardrocklAg, Au, Pb,Zn Mining District:--'--P!lJhi~lip~s ... b!.WuL!.lrg,,--_____ _ Latitude: N 46 0 19' 10" Primary Drainage:_C~am!.lllo<p'->C .... r ... ee!i<Jk!l.-----_ Longitude: W 113 0 16' 47" USGS Code:----'..J17w.Ou1.><0 ... 20""2"--______ _ Land Status:-'-P.,.riv..,a .. te"'-_______ _ Secondary Drainage:-""C""liff"-"'G'-"u""lcwh'--___ _ Quad: Philipsburg Date Investigated :_J>Llu .... ly1-->/.5 ... , Jj19;z;9z:l4L-____ _ Inspectors: Flammang, Belanger. West Organization: Pioneer Technical Services, Inc,

P .A. # 20-073

•

•

The volume of tailings observed at the site was estimated to be 86,635 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 52.4 to 70.6 mg/kg Arsenic: 52 OJ mg/kg Barium: 3,880 to 7,050 mg/kg Cadmium: 10J to 12.4J mg/kg Copper: 187J to 644J mg/kg Manganese: 16,000 mg/kg Lead: 1,920 to 2,340 mg/kg Zinc: 6,820 to 7,860 mg/kg

The volume of waste rock observed at the site was estimated to be 8,350 cubic yards. The following elements were elevated to at least three times the background concentrations: Barium: 1,940 mg/kg Manganese: 36,900 mg/kg

Copper: 330J mg/kg Zinc: 2,500 mg/kg


• Intermittent Cliff Gulch (dry during investigation) flows adjacent to the site on the northeast side. Sediment samples were collected from the Cliff Gulch drainage; however, no observed releases were documented.

• Potential safety hazards observed at the site included two open ad its, a collapsing loadout structure, and a collapsing cabin.

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Mine/Site Name:-",Jo",s>se'lolp~hl!JinlS!e~ _____ _ legal Description: T 8N R 6W Mining District ........ B .. as..,iLLn ________ _ latitude: N 46 0 24' 58" longitude: W 112 0 18' 36" land Status:-':::-Puriv.,a4l<te><--_______ _ Quad: Three Brothers Inspectors: Bisch, Flammang, West Organization: pioneer Technical Services, Inc.


County: Jefferson Section(s): SE 1/4, NE 1/4, Section 26 Mine Type: Hardrock/Au, Ag, Pb Primary Drainage: ........ Ba .. s ... iu.n ~C"'re"'ei<!k'--____ _ USGSCode:_1....,.0""0 .... 2""0""00"'6"-----:-_-,---___ _ Secondary Drainage: Clear Creek Date Investigated: August 2, 1994 PA # 22-031

• The volume of waste rock observed at the site was estimated to be 21,680 cubic yards. Several of the dumps were situated directly in the Clear Creek floodplain. The following elements were elevated to at least three times the background concentrations: Silver: 30.8 to 64.7 mg/kg Arsenic: 1,960J mg/kg Lead: 3,000 to 10,600 mg/kg

• One discharging adit and two filled shafts were observed at the site. The pH of the adit discharge, which eventually entered Clear Creek, was measured at 4.16. The MCl for cadmium and the EPA action level for lead were exceeded in the adit discharge, as were the acute and chronic aquatic life criteria for silver, cadmium, copper, lead, and zinc and the chronic aquatic life criteria for mercury. One of the filled shafts that was sampled during the investigation had a pH of 5.8. No MCls were exceeded in water contained in the shaft.

• Observed releases to Clear Creek were documented for silver and lead. No MCls were exceeded in Clear Creek; however, the acute and chronic aquatic life criteria for silver and lead were exceeded in the downstream sample. These exceedances were directly attributable to the site.

• Potential safety hazards observed at the site included two fenced but open shafts, a collapsing loadout structure, and several collapsing cabins.

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Mine/Site Name:.-"'O""'o..,.ris"--_______ _ Legal Description: T 6N R 5W

County: Jefferson

Mining District:-"'B~as2.!i=':n:_:__-------_ Latitude: N 46 0 66' 58" Longitude: W 112 0 16' 30" Land Status:-L.Pu.riv ... a~te"'__ _______ _ Quad: Basin Inspectors: Bullock, Bisch, Clark. West Organization: Pioneer Technical Services, Inc.


Section(s): SW 1/4, SE 1/4, Section 7 Mine Type: HardrockiUnknown Primary Drainage:-",B",as",iu.n ""C"'re""e .... k'--____ _ USGS Code:_1.u0""0""2",,00,,,,0,,,,6~---:-____ _ Secondary Drainage: Basin Creek Date Investigated: Jyne 17, 1994 P.A. # 22-293

• The volume of waste rock observed at the site was estimated to be 4,470 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 17 mg/kg Cadmium: 11.9JX mg/kg Cobalt: 10.4 mg/kg Copper: 531 J mg/kg

Mercury: 3.33J mg/kg Manganese: 2410JX mg/kg Lead: 182JX to 2,OOOJX mg/kg Zinc: 722 to 1,570 mg/kg

• Waste rock was actively eroding into Basin Creek at the site. An observed release to Basin Creek (sediment) was documented for copper.

• No MCLs were exceeded in Basin Creek; however, acute and chronic aquatic life criteria for copper and zinc were exceeded in both the upstream and downstream samples. Additionally, the chronic aquatic life criteria for lead and mercury were exceeded in both the upstream and downstream samples.

• Potential safety hazards observed at the site included two partially backfilled adits and a collapsing loadout structure (low hazard potential) .

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Mine/Site Name:,_la."dO!.ly'=l..,e"'itlLhL-_____ _ legal Description: T 7N R 5W

County: Jefferson Section(s): NE 1/4, NW 1/4, Section 6 Mine Type: Hardrock/Pb, Zn Mining District,-"'B ... as"'i.u.n ________ _

latitude: N 46 0 23' 2S" Primary Drainage:-"!BaasOllilln~C<l.re5O!esak~ ____ _ longitude: W 1120 16' 4S" USGS Code:---1.l1 080l'-2.1l!OQIll086~ _____ _ land Status: Private/Public Secondary Drainage: Basin Creek Quad: Three Brothers Date Investigated: June 15, 1994 Inspectors: Bisch, Clark, West P.A. # 22-316 Organization: pioneer Technical Services, Inc.


• The volume of waste rock observed at the site was estimated to be 3,505 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 3.6 to 22.2 mg/kg Arsenic: 79.2JX to 3,740JX mg/kg Cadmium: S.OJX to 32.2JX mg/kg Copper: 246J mg/kg Zinc: 620 to 1,100 mg/kg

Mercury: 0.12J to 0.13J mg/kg Manganese: 4,720JX to 5,S20 mg/kg lead: 355JX to 4,950JX mg/kg Antimony: 7S.SJ mg/kg

• Two discharging adits were observed at the site. The MCl and acute and chronic aquatic life criteria for cadmium were exceeded in the discharge from Adit #1; and the MCl for arsenic was exceeded in the discharge from Adit #2. Additionally, acute and chronic aquatic life criteria for copper, lead, and zinc were exceeded in the Adit #1 discharge; and acute and chronic aquatic life criteria for zinc were exceeded in the Adit #2 discharge.

• An unnamed tributary to Basin Creek flows through the site. Observed releases to the stream were documented for manganese (surface water) and arsenic, cadmium, lead, and zinc (sediment). '

• No MCls were exceeded in the tributary; however, the chronic aquatic life criteria for lead was exceeded in the downstream sample. These exceedances were directly attributable to the site.

• Potential safety hazards observed at the site included a fenced, but open shaft and multiple collapsing cabins (lOW hazard potential) .

5-29

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Mine/Site Name: Old Basin Mjllsite Legal Description: T 6N R 5W Mining District:---",Ba""s..,iu.n ________ _ Latitude: N 46 0 16' 10" Longitude: W 112 0 16' 46" Land Status: ___________ _ Quad: Basin Inspectors:.....J.lNu./A:l..-_________ _ Organization: pioneer Technical Services. Inc.

County: Jefferson Section(s): SW 1/4. Section 17: SE 1/4, Section lB Mine Type: Mjllsjte/Ay, Zn, Cu, Ag, Pb Primary Drainage: Boylder River USGS Code:_l..uO""0""2""00"'0"'6'-~----Secondary Drainage: Basin Creek Date Investigated:....uN!,L/A"--_______ _ P.A. # 22-500

• A site visit was not conducted at the site during the 1994 inventory. The EPA investigated the site in 1990, and the northwestern part of the site was investigated by MDSL in 1993 (Basin Millsite Inventory, 22-036).

• According to the EPA, the total surface area covered by tailings at this site was estimated to be 2BO,OOO square feet. However, the EPA's identification of "tailings" includes waste rock. Using this area, the volume of tailings was estimated to range from 10,000 to 30,000 cubic yards. The following elements were elevated to at least three times the background concentrations: Arsenic: 72 to 1,640 mglkg Lead: 274 to 2,710 mglkg

• No discharging adits, filled shafts, seeps, or springs were associated with the site.

• The Boulder River flows adjacent to the site on the south side. Observed releases to the Boulder River were documented for arsenic (surface water) and lead (sediment). No MCLs were exceeded. The water metals data were not comparable to aquatic life standards due to the lack of associated water hardness data.

• Potential safety hazards associated with the site include a collapsing brick smelter stack and flue and a collapsing loadout structure. Potentially hazardous mine openings were not evaluated by the EPA.

5-30



Mine/Site Name: CresentlAlsace legal Description: T 8N R 5W Mining District_C""""at ... a ..... ra .. ct<>-______ _ latitude: N 46 0 25' 17" longitude: W 112 0 14'45" land Status:-'-PuriV.."a .. te"'--_______ _ Quad: Chessman Reservoir Inspectors: Tuesday. Bisch, Flammang Organization: Pioneer Technical Services, Inc.

County: Jefferson Section(s): NE 1/4, NE 114. Section 29 Mine Type: Hardrock/Pb. Ag, Zn, Au Primary Drainage: Boylder River USGS Code:--L.l1 Oo!,!,O""2~0~00~6L.... ______ _ Secondary Drainage: Cataract Creek Date Investigated: Aygust 12, 1994 PA # 22-106

o The volume of tailings observed at the site was estimated to be 840 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 32.6 mg/kg lead: 4,570 mg/kg Cadmium: 3.67 mg/kg Zinc: 618 mg/kg Copper: 356 mg/kg

eo The volume of waste rock observed at the site was estimated to be 8,460 cubic yards. The following elements were elevated to at least three times the background

e

concentrations: Silver: 35.8 mg/kg Copper: 583 mg/kg Iron: 41,300 mg/kg

lead: 5,820 mg/kg Zinc: 340 mg/kg

o One discharging adit was observed at the site. The MCl and acute and chronic aquatic life criteria for cadmium, and the MClG and acute and chronic aquatic life criteria for copper were exceeded in the adit discharge. Additionally, the acute and chronic aquatic life criteria for zinc and the chronic aquatic life criteria for mercury were exceeded in the adit discharge.

o The headwaters of Cataract Creek flows directly adjacent to the site. Observed releases to Cataract Creek were documented for cadmium, copper, lead, and zinc.

o The MCl for cadmium and acute and chronic aquatic life criteria for cadmium, copper, and zinc were exceeded in the downstream sample. These exceedances were directly attributable to the site.

o Potential safety hazards observed at the site included a partially collapsed adit, an unstable load out structure, several collapsing buildings, and various scattered wooden and metal debris.

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Mine/Site Name:,-><B""o""ul""d""'er'-'C ... hwi""ef'--____ _ County: Jefferson legal Description: T 7N R 5W Section{s): SW 1/4, NW 1/4, Section 27

Mine Type: Hardrocklpb, Ag, Cu Primary Drainage: Cataract Creek

Mining District:-loo!C:Qat""awra;uct"--______ _ latitude: N 46° 19' 48" longitude: W 1120 12' 24" USGS Code:_1.!.>0""0""2""00"'0"'6'--_____ _ land Status:-'-P ... riv .... a .. te><-_______ _ Secondary Drainage: Cataract Creek Quad: Mount Thompson Date Investigated: June 14, 1994 Inspectors: Bullock, Bisch, Clark, West Organization: pioneer Technical Services, Inc.

PA # 22-132

• The volume of mill tailings observed at the site was estimated to be 138 cubic yards. The following elements were elevated to at least three times the background concentrations:

•

Silver: 76 mg/kg Mercury: 0.53J mg/kg Arsenic: 186 mg/kg lead: 24,300 mg/kg Cadmium: 170 mg/kg Antimony: 105J mg/kg Copper: 302 mg/kg Zinc: 23,700 mg/kg

The volume of waste rock observed at the site was estimated to be 14,225 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 3.2 to 17.8 mg/kg Cadmium: 9.5J to 13.6J mg/kg Copper: 158 mg/kg Zinc: 883 to 1060 mg/kg

Mercury: 0.83J mg/kg Manganese: 10,100 mg/kg lead: 364 to 7680 mg/kg

• One discharging adit was observed at the site; however, the discharge had no measurable flow at the time of the investigation (standing water) and eventually seeped into a waste rock dump (WR2) after a relatively short surface expression. A sample was collected for field parameters only; the pH was 3.0 and S.C. was 497 uS/em.

• Observed releases to an unnamed tributary of Cataract Creek were documented tor lead and zinc. The MCl for cadmium was exceeded in the tributary as were the acute and chronic aquatic life criteria for cadmium, copper, lead, and zinc. These exceedances were directly attributable to the site.

•

•

Visual impacts to terrestrial vegetation were observed for approximately 1/4-mile downgradient from the site. The stressed vegetation was due to eroding waste rock and tailings (likely occurring during snowmelt and high runoff precipitation events) .

Potential safety hazards observed at the site included an open pit (fenced) with a 30-foot highwall and a collapsing, wooden loadout structure.

5-32

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Mine/Site Name:_R'-C0~c...,k",e.!.Cr/ADd",a,,--,:-:-:--:--__ _ legal Description: T 7N R 5W Mining District->o<C""at ... awra...,c ... t _______ _ latitude: N 46 0 21' 52": N 46 0 21' 44" longitude: W 1120 14' 48": W 112 0 15' 12" land Status: Private/Public Quad: Basin and Mount Thompson Inspectors: Bullock, Bisch, Clark, West Organization: Pioneer Technical Services, Inc.


County: Jefferson Section(s): SW 1/4, NE 1/4, Section 17 Mine Type: HardrocklAu, Ag, Pb Primary Drainage: Cataract Creek USGS Code:---1.!1 Ool.\oO~2~001tl0ol.\o6!....-_____ _ Secondary Drainage: Rocker Creek Date Investigated: June 16, 1994 P.A. # 22-170

• The volume of waste rock observed at the site was estimated to be 7,525 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 6.7 to 116 mg/kg Arsenic: 601JX to 1,190JX mg/kg Cobalt 34.2 mg/kg Copper: 159J to 1,030J mg/kg

Mercury: 0.26J to 1.25J mg/kg lead: 1 ,030JX to 5,440JX mg/kg Antimony: 42.3J to 631J mg/kg Iron: 55,500J mg/kg

• Multiple discharging adits were observed at the site during the investigation: the MCl for arsenic was exceeded in AD-1, AD-2, and AD-4; the MCls for cadmium and copper were exceeded in AD-1 and AD-5; and the MCl for antimony was exceeded in AD-1. Additionally, acute and chronic aquatic life criteria for copper and zinc were exceeded in all the adit discharges at the site.

• Several of the adit discharges flowed directly into Rocker Creek. Observed releases to Rocker Creek were documented for arsenic, copper, and zinc. Acute and chronic aquatic life criteria for copper and zinc were exceeded in Rocker Creek downstream from the site. These exceedances were directly attributable to the site.

• Potential safety hazards observed at the site included a partially open shaft and a collapsing headframe and loadout structure.

• Vehicular access to this site is not possible. The site which is spread out over an area exceeding 3/4-mile in length can be reached by hiking approximately 1/2-mile along a well-marked trail.

5-33

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Mine/Site Name: Crawley Camp legal Description: T 7N R 4W Mining District:~Ccw.ol"lo~ra .. dl.!ooL--______ _ latitude: N 46 0 22' 04" longitude: W 112 0 09' 30" land Status:-'-Pllriv .... a ... te"-_______ _ Quad: Mount Thompson Inspectors: Bullock, Bisch. Clark. West Organization: Pioneer Technical Services, Inc.


County: Jefferson Section(s): SW 1/4. SW 1/4. Section 7 Mine Type: HardrocklUnknown Primary Drainage: Clancy Creek USGS Code:_1.J.j080t.>l3,!L01.u0L!1 ______ _ Secondary Drainage: Clancy Creek Date Investigated: June 13, 1994 PA # 22-028

• The volume of waste rock observed at the site was estimated to be 2,800 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 2.8 to 114 mg/kg Arsenic: 73.7 to 459 mg/kg Copper: 75.4 mg/kg

Mercury: 0.43J mg/kg lead: 553 to 1820 mg/kg Antimony: 1, 150J mg/kg

• The two waste rock dumps associated with this site are situated directly in the floodplain of Upper Clancy Creek. Additionally, the discharging adit associated with the site flowed directly into Upper Clancy Creek. The MCl for arsenic, the acute aquatic life criteria for zinc, and the chronic aquatic life criteria for copper, iron, lead, and zinc were all exceeded in the adit discharge.

• An observed release to Upper Clancy Creek was documented for arsenic. The chronic aquatic life criteria for lead was exceeded in both the upstream and downstream samples, and the chronic aquatic life criteria for iron was exceeded in the downstream sample.

• Potential safety hazards observed at the site included two partially collapsed cabins (low hazard potential) .

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Mine/Site Name:.-"'C:ilau.rm...,o .... dd.Jy'-:: _____ _ Legal Description: T 6N R 3W

County: Jefferson

Mining District:_Ewlk .... ho..,rUJn'---______ _ Section(s): SW 1/4, NW 1/4, Section 14 Mine Type: HardrocklAu, Ag

Latitude: N 46 0 16' 20" Primary Drainage: Elkhorn Creek Longitude: W 111 0 57' 05" USGS Code:----,-,l 0 .... 0""2""0""00...,6"--______ _ Land Status:-'--Puriy""a ... te"'-_______ _ Secondary Drainage: Siaughterhoyse Gulch

Date Investigated: August 4, 1994 Quad: Elkhorn Inspectors: Flammang, Clark, West Organization: pioneer Technical Services, Inc.

P.A. # 22-337

• The volume of tailings observed at the site was estimated to be 15,615 cubic yards. The following elements were elevatedto.at least three times the background concentrations: Silver: 1.7 J to 88.1 J mg/kg Iron: 95,500 to 108,000 mg/kg Arsenic: 272 to 841 mg/kg Mercury: 0.40 to 138 mg/kg Cadmium: 5.1 to 175 mg/kg Lead: 5,540 to 13,100 mg/kg Cobalt: 52.7 J mg/kg Antimony: 487 J to 1, 170J mg/kg Copper: 494 to 1,250 mg/kg Zinc: 278 to 29,500 mg/kg

• Significantly high concentrations of cyanide were detected in TP-l (4,704 mg/kg) and TP-3 (3,075 mg/kg).

• The volume of waste rock observed at the site was estimated to be 2,475 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 1.7J mg/kg Iron: 138,000 mg/kg Arsenic: 1,560 mg/kg Mercury: 1.00 mg/kg Cadmium: 6.6 mg/kg Lead: 53.5 mg/kg Copper: 616 mg/kg


• Slaughterhouse Gulch flows through the center of the site. Observed releases to Slaughterhouse Gulch were documented for iron, lead, and zinc. No MCLs were exceeded in Slaughterhouse Gulch; however, the chronic aquatic life criteria for cadmium, copper, iron, and lead were exceeded in downstream samples. These exceedances were directly attributable to the site.

• Potential safety hazards observed at the site includes two open (but fenced) shafts, two open ad its, three small open pits, and various collapsing wooden and metal structures.

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Mine/Site Name:-'1:lro""n"--_______ _ Legal Description: T 7N R 3W Mining District:,_...!oE"'lkwh"'-ol.!.rnL-______ _ Latitude: N 46 0 18' 37" Longitude: W 111 0 55' 43" Land Status:-'-PLLriv ... a ... te><--_______ _ Quad: Elkhorn Inspectors: Flammang, Belanger, West Organization: Pioneer Technical Servjces, Inc.


County: Jefferson Section(s): SW 1/4, SW 1/4, Section 36 Mine Type: HardrocklFe Primary Drainage: Muskrat Creek USGS Code:_1...,0""0""2""00""0""'6'---:_-:-___ _ Secondary Drainage: Muskrat Creek Date Investigated: August 9, 1994 PA # 22-359

• The volume of waste rock observed at the site was estimated to be 8,535 cubic yards. The following elements were elevated to at least three times the background concentrations: Cobalt: 21.1 to 27.1 mglkg Copper: 410 to 487 mglkg Iron: 64,700 to 75,200 mglkg

• One discharging adit was associated with the site. No MCLs were exceeded in the adit discharge; however, the acute and chronic aquatic life criteria for copper and the chronic aquatic life criteria for mercury were exceeded in the discharge.

• A sediment sample was collected from the adit discharge drainage (downstream from where the adit discharge seeped into the ground). The sediment contained Significantly elevated (>3X background) levels of cobalt, copper, iron, and zinc.

• Potential safety hazards observed at the site included several collapsing load out structures and several collapsing cabins.

5-36

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. Mine Type: Millsite/Ay Mining District---'"'E"'lkuho""'ri.Un'--______ _ Latitude: N 46 0 16' 13" Primary Drainage: Elkhorn Creek Longitude: W 111 0 58' 15" USGS Code:_l.L!oOLlolO~2""'00ol!oOLlol6~ _____ _ Land Status: ........ puriv""a .. te"--_______ _ Secondary Drainage: Tyrnley Meadows Creek Quad: Elkhorn Date Investigated:.--"'Ju""l~y...!l~ . ..1.;19"'94..:1.. ____ _ Inspectors: Bisch, Flammang, West Organization: pioneer Technical Services, Inc.

P.A. # 22-501

• The overall volume of tailings associated with this site could not be determined accurately. The site was previously reclaimed, and bore holes were not drilled through the reclaimed tailings to determine total depth. Although the reclamation effort appeared to have consisted of application of cover soil and revegetation, tailings were observed at the surface in several scattered, isolated pockets. The following elements were elevated to at least three times the background concentrations: Silver: 55.2 mg/kg Mercury: 2.83 mg/kg Arsenic: 229 mg/kg Lead: 3,710 mg/kg Cadmium: 130 mg/kg Antimony: 309J mg/kg Copper: 367 mg/kg Zinc: 12,100J mg/kg


• Turnley Creek flows adjacent to the site on the north side. No observed releases to Turnley Creek were documented; additionally, no MCLs or aquatic life criteria were exceeded in Turnley Creek either upstream or downstream from the site.

• Of the four monitoring wells located at the site, all were installed downgradient from the reclaimed tailings pond (no upgradient wells were found). The shallowest well was sampled (static water level = 8.15 feet from the top of the casing); and no MCLs were exceeded in the sample .

5-37

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Mine/Site Name: Elkhorn Creek Tailings legal Description: T 6N R 3W Mining District:---'=E"'lk.u.ho""rLiJn'--______ "--latitude: N 46 0 10' 11" longitude: W 111 0 57' 18" Land Status:-'-PLLriv .... a .. te""-_______ _ Quad: Elkhorn Inspectors: Tyesday, Belanger, West Organization: pioneer Technical Services, Inc.

County: Jefferson Section(s): SE 1/4. E 1/2, Section 15 Mine Type: HardrocklAy Primary Drainage: Elkhorn Creek USGS Code:_1....,0..,.0""2""00...,0""6'--_____ _ Secondary Drainage: Elkhorn Creek Date Investigated: August 8, 1994 P.A. # 22-502

• The volume of tailings observed at the site was estimated to be 51,635 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 54.1 to 86.4 mg/kg Mercury: 1.71 to 9.36 mg/kg Arsenic: 189 to 448 mg/kg Lead: 3,380 to 8,800 mg/kg Cadmium: 134 to 229 mg/kg Antimony: 256 to 484 mg/kg Copper: 323 to 687 mg/kg Zinc: 12,300 to 18,400 mg/kg



• Elkhorn Creek flows through the center of the site. Observed releases to Elkhorn Creek were documented for lead and zinc. The MCl for cadmium and the acute and chronic aquatic life criteria for cadmium and zinc were exceeded in the downstream sample. These exceedances were directly attributable to the site.

• Potential safety hazards observed at the site included a collapsing mill building .

5-38

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Mine/Site Name:_D~aUJnn,""y,::-T~--=-_=-___ _ Legal Description: T 15N R 9E

County: Judith Basin Section(s): SE 1/4. NW 1/4, Section 7 Mine Type: HardrocklAg, Pb, Zn Primary Drainage: pry Fork Belt Creek

Mining District:-LlH ... ug ... h"'e .. s ..... vwill"'e ______ _ Latitude: N 4ZO 04' 39.7" Longitude: W 110 0 38' 0,7" USGS Code:_1...,0."0""3,...01,,,,0""'5'--_____ _ Land Status:-J...Pllriv""a .. te'"--_______ _ Secondary Drainage: Galena Creek Quad: Barker Date Investigated: Jyly 11. 1994 Inspectors: Tuesday, Bisch, West Organization: pioneer Technical Services, Inc.

P.A. # 23-500

• No mill tailings were observed at the site during the investigation.

• The volume of waste rock observed at the site was estimated to be 10,200 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 12.5JX mg/kg Arsenic: 200J mglkg Copper: 56.3 mg/kg

Mercury: O. 15J mg/kg Lead: 3,140 mg/kg Zinc: 213 mg/kg

• The waste rock dump was actively eroding down the drainage toward Galena Creek.

• One discharging adit that eventually flowed into Galena Creek was observed at the site. The adit was sampled at its mouth (AD-1) and again after flowing over the waste rock dump (SW-1). At the mouth, the pH was 3.01, and the MCLs for arsenic, cadmium, and antimony and the EPA action level for lead were exceeded. In addition, the acute and chronic aquatic life criteria for cadmium, copper, and zinc and the chronic aquatic life criteria for iron and lead were exceeded. After flowing over waste rock, the pH of the discharge was 3.0, and the MCLs for arsenic, cadmium, and antimony were exceeded. The acute and chronic aquatic life criteria for cadmium, copper, and zinc and the chronic aquatic life criteria for arsenic, iron, and lead were also exceeded.

• Galena Creek was not sampled due to known poor water quality and abundant available data for the stream and the effect of the Marcelline Mine below the Danny T at Galena Creek.

• No hazardous mine openings (the adit was gated) or structures were observed at the site; however, abundant debris was scattered throughout the site .

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Mine/Site Name: Roncor/Amax Sapphire Legal Description: T 13N R 11 E Mining District:_y~og~o,,--_______ _ Latitude: N 46 0 52' Longitude: W 110 0 20' Land Status:-':-P':':riv ... a .. te~:--______ _ Quad: Indian Hill and Woodhurst Mountain Inspectors: Byllock, S. Babits Organization: pioneer Technical Services, Inc.

County: Judith Basin Section(s): Sections 21. 22. 23. and 24 Mine Type: Open p;tNogo sapphires Primary Drainage:--'J...,u ... d..,it .... h...l.R ..... iv...,e ..... r _____ _ USGS Code:_1.!.\OllolO!!!,40!.l,1,!,!,0!.>/3c..-_____ _ Secondary Drainage: Yogo Creek Date Investigated: September 10. 1993 P.A. # 23-501

• A site visit was not conducted at this site during the 1994 inventory; however, the site was informally inspected in 1993 while conducting an inventory at the Vortex Site (23-027).

• The tailings observed at the site consisted of fine clays (limestone fines) from wash plant operations. The volume of tailings was not determined, and no tailings samples were collected; however, metals concentrations are expected to be very low according to data collected at the adjacent Vortex Site.

• No discharging adits, filled shafts, seeps, or springs were observed at the site.

• Yogo Creek flows adjacent to the site on the north side. Surface water and !ediment data collected from Yogo Creek in 1993 indicated that metals concentrations were not significantly elevated downstream from the site compared to upstream concentrations. No MCLs or aquatic life criteria were exceeded in Yogo Creek.

• Potential safety hazards observed at the site included two hazardous mine openings, one large open ad it, and an open shaft .

5-40

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Mine/Site Name: Joslyn Street Tailings Legal Description: T 10N R 4W

County: Lewis and Clark Section(s): NE 1/4, NE 1/4, SE 1/4, Section 23

Mining District:_H~el""e.LI.na,,-_______ _ Mine Type:_NutI.C.Al--_________ _ Latitude: N 46 0 35' 49,1" Primary Drainage: Tenmile Creek Longitude: W 1120 03' 56" USGS Code:_1.l..!oO"'0""3.!L01....,,0l..J1 ______ _ Land Status:....L-pu.riv .. au:te"--_______ _ Secondary Drainage: Tenmile Creek Quad: Helena Date Investigated: July 27, 1994 Inspectors: Tuesday, Clark, West Organization: pioneer Technical Services, Inc,

PA # 25-501

•

•

The volume of tailings observed at the site was estimated to be 4,900 cubic yards. The following elements were elevated to at least three times the background concentrations: Arsenic: 8,520 to 29,300 mgJkg Lead: 557 to 9,230 mgJkg Cadmium: 6.4J to 128J mgJkg Antimony: 54.0 to 238 mgJkg Copper: 98.9 to 464 mgJkg Zinc: 1,010 to 16,400 mgJkg Mercury: 0.22 to 0.32 mgJkg

The tailings were located directly in a residential area and had exceptionally high concentrations of arsenic and lead. On-site residents were concerned about groundwater contamination and child exposure to these contaminants.

• No waste rock dumps, discharging adits, filled shafts, seeps, or springs were observed at the site. A small volume of ponded water was observed on one of the tailings areas. The ponded water was sampled for field parameters only (pH = 2.02, SC = 12,400. uS/cm).

• Groundwater samples were collected upgradient and downgradient from the site. No observed releases to groundwater were documented; and no MCLs were exceeded in either of the groundwater samples .

5-41

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Mine/Site Name: Drumlummon Mine. Mill. and Tailings

County: Lewis and Clark Mine/Mill Section (s): SE 1/4. Section 36 and NW 1/4. N 112. Section 1 Legal Description:

Mine/Mill T ...1W.. R ..fS1::L and T ..1.1N.. R ..fS1::L Tailings T ..12!i. R .§)f)L and T .1.1!i. R .§)f)L Mining District,_, J"J,M""a .... ry ... s~vwill ... e ______ _ Latitude: N 46° 44' 36": N 46° 44' 58" Longitude: Wl12° 17'45":W112° 15'28" Land Status: Private/public Quad: Greenhorn Mountain and Canyon Creek Inspectors: Tuesday, Belanger. Clark. West Organization: pioneer Technical Services, Inc,

Tailings Section(s): SE 1/4, S 112, Section 34 and NE 1/4, NE 1/4, Section 31 Mine Type: Hardrock/Cu, Au, Ag, Pb, Zn, Mo Primary Drainage:_Sszwily(Sea.r "l,.C!!!re;<!e;<l:k'----____ _ USGS Code:--ll.ll0y,03080/..l1.ll0,Ll ______ _ Secondary Drainage: Silyer Creek Date Investigated: June 23-24 1994 P.A. # 25-024

• The volume of tailings observed at the site was estimated to be 178,630 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 27.4 mg/kg Arsenic: 33.7 to 35.1 mg/kg Copper: 116 to 149 mg/kg Mercury: 1 .85JX to 1 .94JX mg/kg Lead: 112 to 117 mg/kg Zinc: 205J to 257 J mg/kg

• The volume of waste rock observed at the site was estimated to be 9,020 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 5 mg/kg Arsenic: 46.2 mg/kg Cadmium: 2.8J mg/kg Copper: 55.3 mg/kg Mercury: Q.41JX to 1.43JX mg/kg Lead: 119 mg/kg Zinc: 311J mg/kg

• One discharging adit was observed at the site. The discharge flowed a short distance to a small pond. No MCLs were exceeded in the adit discharge; however, the chronic aquatic life criteria for iron was exceeded.

• Silver Creek flows adjacent to the site on the northwest side. An observed release to Silver Creek (sediment) was documented for mercury; however, no MCLs or aquatic life criteria were exceeded in the stream.

• Potential safety hazards observed at the site included four open shafts, two highwalls associated with two large open pits, and a collapsing loadout structure .

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Mine/Site Name: peerless Jenny/King County: lewis and Clark legal Description: T 8N R 5W Mining District:~R~imLUi~ni,-=:--______ _ latitude: N 46 0 25' 54,Z"

Section(s): SE 1/4, NW 1/4, Section 21 Mine Type: Hardrock/Ay, Ag, Pb Primary Drainage: Banner Creek

longitude: W 112 0 14' 20,9" USGS Code:,----"l 0..,0""3,,,0C1.1 ><..01'--______ _ land Status:-'--Pu:riv ... a..",te"----_______ _ Secondary Drainage: Banner Creek Quad: Chessman Reservoir Inspectors: Tuesday, Clark, West Organization: pioneer Technical Services, Inc,

Date Investigated: Jyly 26, 1994 P.A. # 25-006


• The volume of waste rock associated with this site was estimated to be 28,030 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 25.2JX to 44.ZJX mg/kg Arsenic: 65.2J to 91.3J mg/kg Copper: 103 to 291 mg/kg

Mercury: 0.18 to 0.84 mg/kg lead: 431 to 1,150 mg/kg Zinc: 1,050 mg/kg

• Two discharging adits and numerous springs were associated with the site. The MCl for cadmium and the acute and chronic aquatic life criteria for cadmium, copper, and zinc were exceeded in the Adit #2 discharge. The acute aquatic life criteria for silver and the chronic aquatic life criteria for lead were exceeded in the Adit #1 discharge.

• The adit discharges combined to form the flow in a intermittent drainage which ran through the center of the site. The acute and chronic aquatic life criteria for cadmium, copper, and zinc and the chronic aquatic life criteria for lead were exceeded in the drainage downstream from the site.

• Potential safety hazards observed at the site included two large, collapsing cabinslbunkhouses .

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Mine/Site Name: Woodrow Wilson Legal Description: T 8N R 5W Mining District:'--LlR ... imllJiLllnL.i _______ _ Latitude: N 46 0 24' 51" Longitude: W 112 0 15' 22" Land Status:....L.Puriy,...a .. te"'-_______ _ Quad: Three Brothers Inspectors: Tuesday, Clark, West Organization: Pioneer Technical Services, Inc,


County: Lewis and Clark Section(s): SW 1/4, SW 1/4, SW 1/4, Section 20 Mine Type: HardrocklAu, Ag Primary Drainage: Banner Creek USGS Code:-'-l1 0""0""3"'-01-'-'0"-'1 ___ -----Secondary Drainage: West Fork Banner Creek Date Investigated: July 28, 1994 PA # 25-258

• The volume of waste rock observed at the site was estimated to be 1,085 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 6.5JX mg/kg Mercury: 1.30 mglkg

Arsenic: 295J mg/kg Antimony: 30. OJ mg/kg

• One discharging adit was observed at the site. The discharge eventually reached a tributary of the West Fork of Banner Creek downstream from the site. No MCLs were exceeded in the adit discharge; however, the acute and chronic aquatic life criteria for zinc and the chronic aquatic life criteria for lead were exceeded.

• A tributary to the West Fork of Banner Creek flows through the center of the site. An observed release to the tributary was documented for arsenic. No MCLs were exceeded in the tributary; however, the acute and chronic aquatic life criteria for zinc and the chronic aquatic life criteria for lead were exceeded both upstream and downstream from the site.

• Potential safety hazards observed at the site included unstable slopes near the collapsed adit, and a collapsing cabin .

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Mine/Site Name:~P~et"",e,,::-r :-:-----=:--::::-:-::--: __ _ legal Description: T 8N R 5W

County: Lewis and Clark Section(s): SW 114, SW 1/4, Section 20 Mine Type: HardrocklAu, Ag, Silica Primary Drainage: Banner Creek

Mining District:......,R ..... imwi!lln!...i _______ _ latitude: N 46 0 25' 27 2" longitude: W 112 0 15' 42.7" land Status:-'-p!llriv..,a"'te"'--_______ _ Quad: Three Brothers Inspectors: Tuesday, Clark, West Organization: pioneer Technical Services, Inc,


USGS Code:_1...,0..,0""3""01...,01..l1 ______ _ Secondary Drainage: West Fork Banner Creek Date Investigated: July 28, 1994 P.A. # 25-259

• The volume of waste rock observed at the site was estimated to be 730 cubic yards. The following elements were elevated to at least three times the background concentrations:

•

Arsenic: 142J mg/kg Mercury: 0.78 mg/kg

One discharging adit was associated with the site. The flow from the adit eventually reached a tributary of the West Fork of Banner Creek. The MCl for cadmium and the acute and chronic aquatic life criteria for cadmium and zinc were exceeded in the adit discharge. Additionally, the chronic aquatic life criteria for iron and lead were exceeded in the adit discharge.

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• Potential safety hazards observed at the site included an unstable slope on the waste rock dump due to the dump being undercut by the stream.

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Mine/Site Name:,~QlWus<ee5CInLlls2.l.b!.\jyLUr:y,--_____ County: Lewis and Clark Legal Description: T 8N R 5W Section(s): SE 1/4 NW 1/4. Section 21 Mining District:-l..>R""imwi!L1n .... i ________ Mine Type: HardrocklAy. Ag Latitude: N 46 0 25' 57" , Primary Drainage: Banner Creek Longitude: W 112 0 14' 03" USGS Code:_1.uOl!.lO~3lL01.uOL.l1 ______ _ Land Status: private Secondary Drainage: Banner Creek Quad: Chessman Reservoir Date Investigated: Jyly 26,1994 Inspectors: Tyesday, Clark, West P.A. # 25-262 Organization: pioneer Technical ServiceS, Inc.


• The volume of waste rock observed at the site was estimated to be 3,570 cubic yards of uncovered waste rock on-site. The following elements were elevated to at least three times the background concentrations: Silver: 27.8 mg/kg Copper: 50.5 mg/kg Lead: 727 J mg/kg

Arsenic: 63.6 mg/kg Mercury: 0.37JX to Q.41JX mg/kg

• One discharging adit was observed at the site which was routed through two settling ponds before discharging to Banner Creek. No MCLs were exceeded in the adit discharge; however, the acute and chronic aquatic life criteria for lead and zinc were exceeded.

• The adit discharge entered an intermittent drainage which was dry upstream from the site. Downstream from the site, the acute and chronic aquatic life criteria for cadmium and zinc and the chronic aquatic life criteria for lead were exceeded in this drainage.

• Potential safety hazards observed at the site included one collapsing cabin (low hazard potential) .

5-46

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Mine/Site Name:_M~onLUt ... e-"C<J..r ... is."to,---____ _ Legal Description: T 8N R 5W Mining District_RL..>WimwiUJniL...-_______ _ Latitude: N 46 0 27' 4.7" Longitude: W 112 0 15' 59,6" Land Status:.-1.,.Pllriv .... a ... te"--_______ _ Quad: Three Brothers Inspectors: Tuesday, Clark, West Organization: pioneer Technical Services, Inc.

. • No mill tailings were observed at the site.

County: Lewis and Clark Section(s): NW 1/4, NW 1/4, NW 1/4, Section 17 Mine Type: Hardrock/Au. Ag, Cu, Pb . Primary Drainage: Tenmile Creek USGS Code:_l.!.l0,&Ot.lo!3y.Ol.u0L!1 ______ _ Secondary Drainage: Ruby Creek Date Investigated: July 25, 1994 PA # 25-275

• The volume of waste rock observed at the site was estimated to be 5,935 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 23.6 mg/kg Arsenic: 243 to 540 mg/kg Chromium: 6.7 mg/kg Copper: 61.9 to 121 mg/kg

Iron: 24,900 to 37,100 mg/kg Mercury: 0.11 JX to 1.13JX mg/kg Lead: 1 ,370J to 3,610J mg/kg Antimony: 42.1J to 184J mg/kg

• One discharging adit was observed at the site. The MCL for cadmium and the acute and chronic aquatic life criteria for cadmium, copper and zinc were exceeded in the adit discharge. Additionally, the chronic aquatic life criteria for mercury and lead were exceeded in the adit discharge.

• The adit discharge flows over a waste rock dump and entered a swamp area. The acute and chronic aquatic life criteria for copper and the chronic aquatic life criteria for lead were exceeded in a surface water sample collected from the swamp. An intermittent drainage extended downstream from the swamp; however, the drainage was dry during the investigation~

• Potential safety hazards observed at the site included three open shafts and one open adit.

5-47

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Mine/Site Name: National Extension legal Description: T 8N R 5W Mining District:....uR",-imwillnLi _______ _ latitude: N 46 0 27' 12" longitude: W 112 0 12' 34" land Status:--'--Puriv ... a..,te"'-_______ _ Quad: Chessman Reservoir Inspectors: Tuesday. Flammang, West Organization: pioneer Technical Services, Inc,


County: lewis and Clark Section(s): SE 1/4, SE 1/4, SW 1/4, Section 10 Mine Type: HardrocklUnknown Primary Drainage: Tenmile Creek USGS Code:.-,:-,l 0""0""3,,,,,0,!.l1 0"-'1'--_-,--___ _ Secondary Drainage: Beaver Creek Date Investigated: Aygust 10, 1994 P .A. # 25-287

• The volume of waste rock observed at the site was estimated to be 7,530 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 31.1 to 58.5 mg/kg Arsenic: 2,760 to 2,820 mg/kg Copper: 83.3 to 419 mg/kg

Mercury: 3.07 to 10.7 mg/kg lead: 5,790 to 12,900 mg/kg Antimony: 28.2J mg/kg

• One discharging adit was observed at the site. The" discharge eventually merged with an unnamed tributary to Beaver Creek. The MCls for arsenic and cadmium and the acute and chronic aquatic life criteria for arsenic, cadmium, copper, and zinc were exceeded in the adit discharge. Additionally, the chronic aquatic life criteria for iron and mercury were exceeded in the adit discharge.

• An unnamed tributary to Beaver Creek flows through the center of the site. Observed releases to the tributary (sediment) were documented for arsenic and lead. The MCl for cadmium was exceeded both upstream and downstream from the site; the MCl for arsenic was exceeded upstream from the site. The acute and chronic aquatic life criteria for cadmium, copper, and zinc and the chronic aquatic life criteria for mercury and lead were exceeded both upstream and downstream from the site. The acute aquatic life criteria for lead was exceeded downstream from the site; this exceedance was directly attributable to the site.

• Potential safety hazards observed at the site included an open pit and an unstable slope above a collapsed adit.

5-48

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Mine/Site Name: Monitor Creek Tailings Legal Description: T 8N R 6W Mining District:~R~imUliLLnil::-_______ _ Latitude: N 46 0 25' 46" Longitude: W 112 0 17' 56" Land Status:_PLr!..!:iv ... a....,te~ _______ _ Quad: Three Brothers Inspectors: Tuesday, Bisch, Flammang, West Organization: Pioneer Technical Services, Inc.

County: Lewis and Clark Section(s): SE 1/4, NE 1/4, NW 1/4, Section 24 Mine Type: Millsite/Unknown Primary Drainage: Tenmile Creek USGS Code:---"l 0 .... 0 .... 3""0'"'-1 0 .... 1'--______ _ Secondary Drainage: Monitor Creek Date Investigated: August 3, 1994 PA # 25-503

• The volume of tailings observed at the site was estimated to be 19,650 cubic yards. The tailings are located in two separate areas with approximately 6,740 cubic yards located directly in or very near the Monitor Creek drainage. The following elements were elevated to at least three times the background concentrations: Silver: 4.8J to 4.9J mglkg Mercury: 1.79 mglkg

• No waste rock dumps were observed at the site during the investigation; however, there was evidence of extensive placer workings in Monitor Creek both upstream and downstream from the site.

• An observed release to Monitor Creek (sediment) was documented for silver. No MCLs were exceeded in Monitor Creek; however, the acute and chronic aquatic life criteria for copper and zinc were exceeded both upstream and downstream from the site. Additionally, the chronic aquatic life criteria for mercury and lead were exceeded both upstream and downstream from the site.

• No hazardous openings or structures were observed at the site during the investigation; however, one tailings pile was being undercut by the stream, thus, creating an unstable bank .

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Mine/Site Name:._B""'ea""rt....;G""""yl""'c!.,Lh _____ _ legal Description: T 9N R 5W Mining District:.-,-,R ... imLIJi ... nL-i _______ _ latitude: N 46 0 32' 32" longitude: W 112 0 15' 43" Land Status:--LPllriv!..!8 .. te"'-_______ _ Quad: MacDonald pass Inspectors: Tyesday, Bisch, West Organization: pioneer Technical Services, Inc.


County: lewis and Clark Section(s): NW 1/4. NE 1/4. NW 1/4. Section 17 Mine Type: HardrocklAu Primary Drainage: Tenmile Creek USGS Code:_l.!.!0""0""3,...01J.>0 ... 1_--=--:-:-___ _ Secondary Drainage:.-"'B""ea!ilJrc..:G""""'yl""chL!..:-___ _ Date Investigated: Aygyst 16. 1994 P.A. # 25-504

• The volume of waste rock observed at the site was estimated to be 4,720 cubic yards. The following element was elevated to at least three times the background concentrations: Copper: 129 mg/kg

e· One discharging adit was observed at the site. The discharge was contained in a small lined pond after flowing a short distance. The MCl for cadmium and the acute and chronic aquatic life criteria for cadmium and copper were exceeded in the adit discharge. Additionally, the chronic aquatic life criteria for mercury was exceeded in the adit discharge.

•

• Bear Gulch flows adjacent to the site on the south side. The MCl for cadmium, as well as the acute and chronic aquatic life criteria for cadmium, were exceeded in the downstream sample. The chronic aquatic life criteria for mercury was exceeded both upstream and downstream from the site. None of these exceedances were attributable to the site.

• No hazardous openings or structures were located at the site .

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Mine/Site Name: Jay Gould Mine and Millsjte Legal Description: T 13N R 7W Mining District:_S"""te"-,m-,,,pll!le~ ______ _ Latitude: N 46 0 52' 44" Longitude: W 112 0 27' 19" Land Status:-'-Pllriv .... a ... te"'--_______ _ Quad: Stemple Pass Inspectors: Tyesday, Belanger, Clark, West Organization: pioneer Technical Services, Inc.

County: Lewis and Clark Section{s): S 1/2, Section 14 Mine Type: HardrockJAu, Ag Primary Drainage: Virginia Creek USGS Code:_1.!.l0""O!.>o!3.!oL01.u0.u1 ______ _ Secondary Drainage: Gould Creek Date Investigated: June 21, 1994 P.A. # 25-500


•

Cadmium: 9.5J mg/kg Zinc: 562J mg/kg Copper: 149 mg/kg Mercury: 115JX mg/kg Lead: 678 mg/kg

The volume of waste rock Observed at the site was estimated to be 7,730 cubic yards; however, no elements were significantly elevated (>3X) above background concentrations.

• One discharging adit was observed at the site. No MCLs or aquatic life criteria were exceeded in the adit discharge.

• Gould Creek flows through the center of the site. Observed releases to Gould Creek (sediment) were documented for mercury and lead. No MCLs or aquatic life criteria were exceeded in Gould Creek.

• Potential safety hazards observed at the site included the collapsed mill building, several collapsed cabins, and a steep highwalliocated above the adit.

5-51

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Mine/Site Name: New Jay Gould Millsite Legal Description: T 13N R 7W Mining District:_S ... t""'e""m ... p"'le'"-______ _ Latitude: N 46 0 53' 24" Longitude: W 112 0 26' 31,4" Land Status:....L"puriv ... a .. te"'-_______ _ Quad: Stemple pass Inspectors: Tuesday, Clark, West Organization: pioneer Technical ServiceS, Inc.

County: Lewis and Clark Section(s): NW 1/4. NW 1/4. SW 1/4. Section 13 Mine Type: Millsite/Unknown Primary Drainage: Virginia Creek USGS Code:_l...,0""'0""3"""01 .... 0::'1_-:-:---:-_-:--__ Secondary Drainage: Fool Hen Creek Date Investigated: JulY 29, 1994 P.A. # 25-502


•

•

Arsenic: 197 J mg/kg Lead: 376 mg/kg

No waste rock was observed at the site.

No discharging adits, filled shafts, seeps, or springs were observed at the site during the investigation.

• Fool Hen Gulch flows adjacent to the site on the south side. No observed releases to Fool Hen Gulch were documented; however, concentrations of silver, barium, and mercury were significantly elevated (>3X) in downstream sediment when compared to upstream sediment. No MCLs or aquatic life criteria were exceeded in the stream.

• Potential safety hazards observed at the site included three collapsing cabins (low hazard potential).

5-52

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Mine/Site Name: Gamet Gold Mine Legal Description: T 2S R 3W

County: Madison Section(s): SE 1/4, Section 23

Mining District:~p~on~y,:= _______ _ Latitude: N 45" 38' 42"

Mine Type: Hardrock/Au, Cy, Ag, Zn, Pb Primary Drainage: North Willow Creek

Longitude: W 111" 56' 07" USGS Code:_1.u0L!<0~2J.ll000l.!00l>l5Co_ _____ _ Land Status:-'-Pllriv"'a .... te"'-_______ _ Secondary Drainage: Cataract Creek Quad: Pony Date Investigated:_J,..,u .... lyJ,.;.· ... 8~, 1...,9",9""4'---____ _ Inspectors: Flammang, Belanger. West Organization: pioneer Technical Services, Inc.

P.A. # 29-035

•

•

The volume of mill tailings Observed at the site was estimated to be 23,450 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 8.1 to 14.6 mg/kg Barium: 471 mg/kg Mercury: 0.76J to 0.82J mg/kg

Lead: 2,160 to 5,380 mg/kg Copper: 306 to 1,290 mg/kg

The volume of waste rock observed at the site was estimated to be 21,640 cubic yards. The following elements were elevated to at least three times the background concentrations: Copper: 105 to 194 mg/kg Lead: 351 to 515 mg/kg Mercury: 0.29J to 0.34J mg/kg

• One discharging adit was observed at the site. MCLs for cadmium and antimony were exceeded in the adit discharge. In addition, acute and chronic aquatic life criteria for copper and zinc and chronic aquatic life criteria for cadmium and lead were exceeded in the adit discharge.

• Cataract Creek flows directly through tailings at the site. Observed releases to Cataract Creek (sediment) were documented for copper, mercury, and lead.

• No MCLs were exceeded in Cataract Creek; however, the chronic aquatic life criteria for lead was exceeded in the downstream sample.

• Potential safety hazards observed at the site included two partially accessible adits and an open shaft.

5-53

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Mine/Site Name: Chicago Mining Corp. Pony Millsjte Legal Description: T .2.S.. R.:JYL; T .2.S.. R.:l.W Mining District ....... p".,onu;yJ---_______ _ Latitude: N 45 0 39' 27" Longitude: W 111 0 54' 17" Land Status: ....... p.u.rjv .... a ... te"'-_______ _ Quad: Pony Inspectors: Tuesday, Belanger. West Organization: pjoneer Technjcal Services, Inc. '

County: Madison Section(s): SE 1/4. SE 1/4. Section 13: SW 1/4 SW 1/4. Sect jon 18 Mine Type: Milisite/Ay Primary Drainage: North Willow Creek USGS Code:--..J.1...,00 ... 2 .... 0""0,.,05~__:_:_==____::___:__Secondary Drainage: North WjI!ow Creek Date Investigated: Aygyst 11, 1994 P.A. # 29-500

• No samples were collected at this site during the 1994 inventory; the team was unable to enter the locked premises.

• One tailings pond was observed at the site; however, the tailings were not bored or sampled. and the volume is unknown .

• Cyanide has been detected in the groundwater downgradient from this facility in a spring and a residential well. Cyanide concentrations detected in November of 1994 did not exceed drinking water standards.

• No discharging adits or filled shafts were observed at the site.

• Pony Creek flows adjacent to the site on the north side, and North WjI!ow Creek flowed adjacent to the site on the southeast side. Surface water data collected in 1994 indicated that no metals were elevated downstream in North Willow Creek compared to upstream concentrations. No 1994 surface water data was available for Pony Creek downstream from the site .

5-54

•

•

•



Mine/Site Name:---""U-"'.S .... ...>G"'r ... a ... nt'--_____ _ County: Madison Legal Description: T 6S R 3W Section(s): NW 1/4, SW 1/4. Section 26

Mine Type: Hardrock, Mil/site/Au, Ag Primary Drainage: Granite Creek

Mining District:_V..l!..II:irg~iun!SaiaL..lC.ui.1Jty"-------_ Latitude: N 46 0 24' 58,8" Longitude: W 112 0 18' 40.6" USGS Code:---,:,1 0"'0"'2""0""00""3"----::--:-____ _ Land Status:,--'-P .... riv .... a .... t><.e ________ _ Secondary Drainage:.....,Aul""d""e!...r G""""'u"'lc ... h ____ _ Quad: Virginia City Date Investigated: July 18. 1994 Inspectors: Flammang. Clark, West Organization: pioneer Technical Services, Inc.

P .A. # 29-095

•

•

The volume of tailings observed at the site was estimated to be 20,930 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 22.6 to 28.9 mg/kg Mercury: 0.27 J mg/kg Arsenic: 143 mg/kg lead: 468 to 13,700 mg/kg Copper: 125 to 759 mg/kg Antimony: 124J mg/kg Iron: 108,000 mg/kg Zinc: 338 to 13,100 mg/kg

The volume of waste rock observed at the site was estimated to be 3,305 mg/kg. The following elements were elevated to at least three times the background concentrations: Silver: 6.8 to 39.9 mg/kg Mercury: 0.38J to 0.42J mg/kg Arsenic: 31.6 mg/kg lead: 855 to 1,100 mg/kg Cadmium: 4.9 mg/kg Copper: 74.7 to 127 mg/kg

• One discharging adit was observed at the site. The flow from this adit eventually merged with Alder Gulch. No MCls were exceeded in the adit discharge; however, the chronic aquatic life criteria for mercury was exceeded.

• Two groundwater wells were sampled during the investigation. The MCl for antimony was exceeded in a monitoring well located at the base of the dam at TP-1. No MCls were exceeded in a residential well located on-site.

• Alder Gulch flows through the center of the site. An observed release to Alder Gulch was documented for copper. No MCls were exceeded in Alder Gulch; however, the acute and chronic aquatic life criteria for copper were exceeded in the downstream sample. These exceedances were directly attributable to the site.

• Potential safety hazards observed at the site included five open adits, a collapsing load out structure, and a pit with a 40-feet tall highwall .

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Mine/Site Name:,.....Io!Bxelusle __________ _ County: Madison Legal Description: T 6S R 3W Section(s): NE 114, SW 1/4, Section 35

Mine Type: HardrocklAy, Ag Mining District_VJ<,Wirg"'ilJJni ... a.."C""ity'S-__ ----' __ _ Latitude: N 45 0 16' 8,6" Primary Drainage: Granite Creek Longitude: W 111 0 56' 6,8" USGS Code:_l.u0",0~2""00,,,,0Ui.3,--_____ _ Land Status:~P,=riv .... a .. te",--_______ _ Quad: Virginia City

Secondary Drainage:~A=>dld".e1-r .... G"'y""lcwh'-__ --Date Investigated: Jyly 19 and 20, 1994

Inspectors: Flammang, Clark, West Organization: pioneer Technical Services Inc,

P .A. # 29-098

• The volume of tailings observed at the site was estimated to be less than 5 cubic yards.

•

The tailings were located in two separate piles on the mill foundation. The literature indicates that tailings were shipped off-site for processing. No tailings samples were submitted for analysis due to the small volume involved.

The volume of waste rock observed at the site was estimated to be 7,645 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 3.0 to 80.5 mg/kg Barium: 895 mg/kg Cadmium: 2.8 to 8.1 mg/kg Cobalt 26.2 to 34.1 mg/kg Copper: 170 to 1,870 mg/kg

Mercury: 0.24J to 1.31J mg/kg Nickel: 83.5 mg/kg Lead: 313 to 1,040 mg/kg Zinc: 367 to 991 mg/kg

• No discharging adits, seeps, or springs were observed at the site.

• Alder Gulch flows adjacent to the site on the east side, and a tributary to Alder Gulch flows adjacent to the site on the south side. No observed releases to surface water were documented during the investigation. No MCLs were exceeded in either of the streams; however, the chronic aquatic life criteria for mercury was exceeded in both streams upstream and downstream from the site.

• Potential safety hazards observed at the site included one open adit and several collapsing wooden structures .

5-56

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Mine/Site Name: Prospect Mine and Millsite County: Madison Legal Description: T 6S R 3W Mining District:_V ........ irg .... iun; ... a.."C .... ity>s-_____ _ Latitude: N 45 0 17' 30" Longitude: W 111 0 57' 45" Land Status:--LPUr;VlUaUte5i.-_______ _ Quad: Virginia City . Inspectors: Flammang, Clark, West Organization: pioneer Technical Services, Inc.

Section(s): SE 1/4, Se 1/4, Section 21: NW 1/4, NW 1/4, Section 27 Mine Type: Hardrock: Mills;te/Au, AS Pb In. Cu Primary Drainage: Granite Creek USGS Code:,---",1 0""Q~2"",Q""QQ",,3,,--______ _ Secondary Drainage: Alder Gulch Date Investigated: July 19, 1994 P.A. # 29-136

• Areas of the mine were being actively re-worked during the investigation.

• The volume of tailings observed at the site was estimated to be 17,440 cubic yards. The following elements were elevated to at least three times the background concentrations: Silver: 4.5 to 6.0 mg/kg Mercury: 0.73J to O.77J mg/kg Arsenic: 50.0 to 59.6 mg/kg Lead: 467 to 698 mg/kg Barium: 2,950 to 3,250 mg/kg Copper: 76.4 to 80.1 mg/kg

• The volume of waste rock observed at the site was estimated to be 18,590 cubic yards. The following elements were elevated to at least three times the background concentrations: Arsenic: 38.4 mg/kg Lead: 147 mg/kg

• No discharging ad its , filled shafts, seeps, or springs were observed at the site during the investigation.

• Intermittent Barton Gulch (dry during investigation) flows through the center of the site. Tailings make up the majority of the surface sediment in Barton Gulch for at least 1,200 feet downstream from the site. Observed releases to Barton Gulch (sediment) were documented for silver, barium, copper, mercury, and lead.

• Potential safety hazards observed at the site included several undercut banks along tailings piles located near Barton Gulch .

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Mine/Site Name:...".G~o ... ld,-,Clo<Jhwr-",ollm",e,--____ _ Legal Description: T 18N R 30W Mining District:_S",t~. J",R".e:>'g .... is'--______ _ Latitude: N 47 0 20' 45" Longitude: W 115 0 22' 40" Land Status:....L.P""yb""I"'ic'--_______ _ Quad: McGee PeaklPeBorgia Soyth Inspectors: Tuesday, Bisch, West Organization: pioneer Technical Services, Inc,

County: Mineral Section(s): SW 1/4, NE 1/4, Section 2 Mine Type: Hardrock/Unknown Primary Drainage: St, Regis River USGS Code:,--'-'17 .... 0 ..... 1""'02...,0""4'--_____ _ Secondary Drainage :,-'='D""e""erl",,;C""""re""e:uk ____ _ Date Investigated: Aygust 15, 1994 P.A. # 31-037

• The volume of tailings observed at the site was estimated to be 980 cubic yards. The tailings appeared to have been reclaimed and were well vegetated. No elements were significantly elevated (>3X) above background concentrations.

• No waste rock was observed at the site .

• One discharging adit was observed at the site. The discharge seeped into the ground after flowing a short distance. No MCLs were exceeded in the adit discharge; however, the chronic aquatic life criteria for mercury and lead were exceeded.

• Deer Creek flows adjacent to the site on the east side. Surface water samples were not collected from Deer Creek due to the significant flow in the stream and likely high dilution. Sediment samples were collected upstream and downstream from the site; however, metals concentrations were not elevated in the downstream sample when compared with the upstream sample.

• No hazardous openings or structures were observed at the site .

5-58

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Mine/Site Name: Wallace Creek Millsjte Legal Description: T 12N R 17W Mining District:_C"'"1!Jljn"'t,..onL!:--_______ _ Latitude: N 46 0 47' 44" Longitude: W 113 0 40' 27" Land Status:....L..Purivl[.!aiUte"----_______ _ Quad: Clinton Inspectors: Bisch, Flammang, Clark, West Organization: pioneer Technical Services, Inc.

County: Missoula Section(s): SW1/4. SE 1/4, Section 24 Mine Type: Mil/sjte/Au Ag, Cu, Pb Primary Drainage: Clark Fork River USGS Code:--'-'17uOu1""'0...,20\l.,1'---______ _ Secondary Drainage: Wallace Creek Date Investigated: June 30, 1994 PA # 32-019

• The volume of tailings observed at the site was estimated to be 10,020 cubic yards. The following elements were elevated to at least three times the background concentrations (cyanide was detected in the tailings at 0.281 mg/kg): Arsenic: 67.5J to 118J mg/kg Lead: 322 to 544 mg/kg Barium: 300 mg/kg Antimony: 12.8 mg/kg Cadmium: 1.8J mg/kg Zinc: 242J to 442J m/kg Mercury: 1.05 to 4.52 mg/kg


• There were no discharging adits or filled shafts observed at the site. A spring that emanated near the mill complex was sampled. No MCLs or acute or chronic aquatic life criteria were exceeded. Another spring located approximately 800 feet downstream from the site was piped to a residence and used as a drinking water source. Using the spring located near the mill complex as the upgradient sample, and the drinking water spring as the downgradient sample, observed releases to groundwater were documented for zinc and cyanide; however, no MCLs were exceeded in the drinking water spring.

• Intermittent Wallace Creek flows adjacent to the site on the north side. Water was flOWing in Wallace Creek for a short distance downstream from the site; however, no water was present in the drainage upstream from the site. No observed releases to Wallace Creek were documented, and no MCLs or aquatic life criteria were exceeded.

• Potential safety hazards observed at the site included the collapsing mill building and various scattered debris .

5-59

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Mine/Site Name:_C~op~p""e"-r~C,,,-liffl.1...-____ _ Legal Description: T 12N R 15W Mining District:_C""",oPIllP~eiU.r--"C""liwff ______ _ Latitude: N 46 0 48' 0.0" Longitude: W 113 0 27' 14.7" Land Status:-'::-Pllriv""a""te"-_______ _ Quad: Union Peak Inspectors: Bisch, Flammang, Clark, West Organization: Pioneer Technical Services, Inc.


County: Missoula Section(s): NW 1/4, SW 1/4, Section 11 Mine Type: Hardrock/Cu, Ag, Au Primary Drainage:_UloU..!.ni .... oun--"C""r"'ee .... k"--____ _ USGS Code:_1.u7 ..... 0'-!,10""2""0""'3'-_____ _ Secondary Drainage: Union Creek Date Investigated: June 28, 1994 P.A. # 32-001

• The volume of waste rock observed at the site was estimated to be 3,490 cubic yards. The following elements were elevated to at least three times the background concentrations: Arsenic: 175J to 2,590J mg/kg Chromium: 61 .OJ mg/kg Copper: 462J to 5,200J mg/kg Iron: 79,900 mg/kg

Mercury: 0.40 mg/kg Nickel: 40.1JX mg/kg Lead: 48.4 to 167 mg/kg

• An intermittent drainage (dry during the investigation) meandered through the site before merging with Union Creek. Observed releases to the intermittent drainage (sediment) were documented for arsenic, copper, mercury, and lead.

• Potential safety hazards observed at the site included an unstable metal loadout structure and scattered wooden and metal debris in the area of the collapsed shaft.

5-60

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Mine/Site Name:-'-F'::"roQjg""s ... p ... inL!le .... r _____ _ Legal Description: T 12N R 15W Mining District:-"'C:>t,op"'p"'e .... r-"C ... liwff ______ _ Latitude: N 46 0 48' 44" Longitude: W 1130 27' 00" Land Status:--'-P.l.Lriv.,a .. te"'-_______ _ Quad: Union peak Inspectors: Bisch Flammang, Clark, West Organization: pioneer Technical Services, Inc,


County: Missoula Section(s): SE 1/4. NW 1/4. Section 11 Mine Type: Hardrock/Unknown Primary Drainage:-:-""Ulln""io""n....>C ... r .... ee""kll..-____ _ USGS Code:----""17""0w.1""02 .... 0.,.3'-:---:-_-:--__ _ Secondary Drainage: Union Creek Date Investigated: Jyne 28. 1994 PA # 32-027

• The volume of waste rock observed at the site was estimated to be 315 cubic yards. The following elements were elevated to at least three times the background concentrations: Arsenic: 129J mg/kg Mercury: 0.70 mg/kg Cobalt: 37.0J mg/kg Nickel: 36.1JX mg/kg Copper: 203J mg/kg Lead: 34.7 mg/kg Iron: 59,300 mg/kg

• One discharging adit was observed at the site. No MCLs were exceeded in the adit discharge; however, the chronic aquatic life criteria for iron was exceeded.

• Union Creek flows through the center of the site. An observed release to Union Creek was documented for iron; however, no MCLs or acute or chronic aquatic life criteria were exceeded in the stream.

5-61

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Mine/Site Name: Great Republic Smelter County:_PL..asaJrl.Dk~,....,..,----:=--_--::-:~:----=-__ _ Legal Description: T 9S R 14E Section(s): SW 1/4 NE 1/4, NW 1/4, Section 36

Mine Type: Smelter, Au, Ag, Cu, Pb, Zn Primary Drainage: Soda Butte Creek

Mining District:_Nue""w ....... W-"o ... r...,.ld"--_____ _ Latitude: N 45 0 00' 59" Longitude: W 1090 56' 13" USGS Code:.~ . .!21 0""OuZ""'0""00 ... 1.1..---:-_____ _ Land Status: Private/public Secondary Drainage: Woody Creek Quad: Cooke City Date Investigated: August 1Z, 1994 Inspectors: Tuesday, Bisch, West Organization: pioneer Technical Services, Inc.

P .A. # 34-000

• No mill tailings were observed at the site; however, the volume of smelter slag observed e was estimated to be 3,840 cubic yards. The following elements were elevated to at least three times the background concentrations in the slag: Arsenic: 1,150 mg/kg Manganese: 68,ZOOJ mg/kg Cadmium: 23.9 mg/kg Lead: 38,200 mg/kg Copper: 939 mg/kg Antimony: 91.0J mg/kg Iron: 81,400 mg/kg Zinc: 23,ZOO mg/kg

• The volume of waste rock observed at the site was estimated to be 15 cubic yards. The following elements were elevated to at least three times the background concentrations: Arsenic: 9,220 mg/kg Manganese: 69,000J mg/kg Cadmium: 210 mg/kg Lead: 42,100 mg/kg Copper: 1,600 mg/kg Antimony: 95.ZJ mg/kg Iron: 121,000 mg/kg Zinc: 18,300 mg/kg Mercury: 1.1Z mg/kg

• There were no discharging adits, filled shafts, seeps, or springs observed at the site during the investigation.

• Woody Creek flows adjacent to the site on the north side. The slag pile was on the bank of Woody Creek and was being actively undercut by the stream. No observed releases were documented. The chronic aquatic life criteria for iron, mercury, and lead were exceeded both upstream and downstream from the site.

• The severely undercut slag pile was the only safety hazard observed at the site.

5-62

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• 6.0 REFERENCES

MBMG, Well Log Database, July 14, 1994.

MDFWP, Montana Rivers Information System Rivers Report, Version 2.0, Prepared by Montana Natural Resource Information System, December 1989.

MDHESIWQB, Circular 7, July 15, 1994.

Pioneer, 1994a. Sampling and Analysis Plan for the Abandoned Mines Hazardous Materials Inventory, May 1994.

Pioneer, 1994b. Quality Assurance Project Plan for the Abandoned Mines Hazardous Materials Inventory, May 1994.

Pioneer, 1994c. Laboratory Analytical Protocol for the Abandoned Mines Hazardous Materials Inventory, May 1994.

Pioneer, 1994d. Health and Safety Plan for the Abandoned Mines Hazardous Materials Inventory, May 1994.

Pioneer, 1994e. Abandoned Hardrock Mines Project Report for the Abandoned • Hardrock Mine Priority Sites, December 1994 .

• 6-1

•

•

•

GLOSSARY

Abandoned Mine; Abandoned Workings - Excavations, either open, caved, or sealed, that are deserted and in which further mining is not intended.

Acid Mine Water - Mine water which contains sulfuric acid, mainly due to the oxidation of iron pyrite.

Acidity - Estimate of the capacity for a neutral water to neutralize caustic wastes without disturbing biological activities.

Activator (floatation mill) - A reagent that facilitates floatation of selected mineral species in a flotation cell.

Acute Aquatic Life Criteria - EPA's maximum acute toxicity concentrations for protection of aquatic life and its uses as established under Section 304(a)(1) of the Clean Water Act, as amended.

Adit - A horizontal or nearly horizontal passage driven in rock from the surface of the working or dewatering ofa mine.

Alkalinity - Estimate of the capacity for a neutral water to neutralize acidic wastes without disturbing biological activ~ies.

Alluvium - Sediments deposited on land by streams and rivers.

AIMSS - Abandoned and Inactive Mines Scoring System.

Amalgamation - The process by which mercury is alloyed with some other metal to produce an amalgam. Used at one time for the extraction of gold and silver from pulverized ores .

Attribution - To document an observed release of a hazardous substance(s) to the environment, the presence of the hazardous substance(s) must be attributable to a waste source at the site. For example, if an observed release to surface water can be established for copper, the concentration of copper in any waste source at the s~e must exist at greater than three times the background concentration of copper to establish attribution to the site.

BlM - United States Department of Interior, Bureau of Land Management.

Ball Mill - A rotating horizontal cylinder in which nonmetallic materials are ground using various types of grinding media such as quartz pebbles, porcelain balls, or steel balls.

Barren Solution - leaching solution that has been chemically stripped of metal values. Typically, the barren solution is recharged with leaching agent and recycled.

Benefication - The processing of ores for the purpose of (1) regulating the size of a desired product, (2) removing unwanted constituents, and (3) improving the quality, purity, or assay grade of a desired product.

Bore Hole - An exploratory or prospecting hole made by drilling.

CECRA - The Comprehensive Environmental Cleanup and Responsibility Act.

CERCLA - Comprehensive Environmental Response, Compensation, and Liability Act of 1980, also known as Superfund: Amended in 1986 by the Superfund Amendments and Reauthorization Act (SARA).

Chronic Aquatic Life Criteria - EPA's maximum chronic toxicity concentrations for protection of aquatic life and its uses as established under Section 304(a)(1) of the Clean Water Act, as amended .

Claim - An area of land claimed by an individual or corporation for the ultimate purpose of mineral extraction. The dimensions of a lode claim are 600 by 1,500 feet; for a placer claim, 600 by 1,320 feet.

Collar - The term applied to the timbering or concrete around the mouth or top of a shaft. The junction of a • mine shaft with the surface.

Collector (floatation mill) - A reagent that aids or faCilitates the attraction of mineral particles to the froth in a floatation cell.

Comminution - To reduce solids to minute particles by crushing and grinding to liberate metals.

Concentrate - To separate metal or ore from the associated gangue or barren rock.

Concentrate (mineral concentrate) - Enriched ore after the removal of waste in a benefication mill.

Concentrator - Mill or plant in which ore is concentrated by removing unwanted constituents.

Containment - Engineered structures designed to prevent releases to groundwater, such as liners, covers, and run-on diversions.

Country Rock - General term applied to the rock surrounding and penetrated by mineralized veins; in a wider sense applied to the rocks invaded by and surrounding an igneous intrusion.

Cribbing - A method of timbering used primarily to rectifY the removal of too great a percentage of the rock on the advance, and has the effect of replacing part of the rock.

Crosscut - (1) a passageway driven at right angles to the main entry to connect it with a parallel entry of air course. (2) A horizontal opening driven across the course of a vein or in general perpendicular to the direction of the main workings.

Crusher - A machine for crushing rock or other materials. Among the various types of crushers are the • ball-mill, gyratory crusher, Hadsel mill, jaw crusher, rod mill, rolls, stamp mill, and tube mill.

Cyanide - A salt or ester of hydrocyanic acid. In aqueous solution, cyanide is used to dissolve metal from gangue material for later recovery.

Cyclone - A device for classification by centrifugal means of fine particles suspended in water, whereby the coarser grains collect and are discharged at the apex of the vessel, while the finer particles are eliminated wijh the bulk of the water at the discharge orifice.

DNRC - Montana Department of Natural Resources and Conservation.

Depressant (floatation mill) - A reagent that causes selected mineral species to sink in a floatation cell.

Drainage Basin Code - Code assigned to each discrete hydrologic unit by the U.S. Geological Survey.

Drift - A horizontal passage underground. A drift follows the vein, as distinguished from a crosscut, which intersects it.

Dump - A pile or heap of waste rock material or other non-ore refuse near a mine.

Electrowinning - Recovery of a metal from an ore or solution by electrochemical processes.

EPA - United States Environmental Protection Agency.

Face - the surface exposed by excavation. the working face, front, or forehead is the face at the end of the • tunnel heading, or at the end of the full size excavation.

Floatation - The method of mineral separation which a froth created in water by a variety of reagents floats some finely crushed minerals, whereas other mineral sink.

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Floatation Cell - Device in which froth floatation of ores is performed. It has provisions for receiving conditioned pulp, aerating the pulp, and for separate discharge of the resulting mineralized froth and impoverished tailings.

Floodplain - An alluvial plain caused by the overbank deposition of alluvial material. They typically appear as flat expanses of land bordering a stream or river. Most floodplains are accompanied by a series of alluvial terraces of varying levels. Fluvial - Pertaining to or produced by the action of a stream or river.

Frother - A reagent which serves to stabilize the froth in a floatation cell until it can be scraped off into the concentrate launder.

Glory Hole - Large, open hole typically associated with a mined-out or widened shaft.

Gravity Mill - A process in which heavy metals or minerals are separated from waste by the action of agitation and gravity on materials suspended in a liquid, usually water.

Grizzly - A devise used for coarse screening of bulk materials. A rugged screen for rough sizing at a comparatively large size (for example, 6-inches); it can comprise fixed or moving bars, disks, or shaped tumblers or rollers.

HRS - EPA's Hazard Ranking System (Federal Register, Vol. 55, No. 241, pp. 51532-51667).

Hand Auger - A large tool modeled after the carpenter's drill used in soil sampling.

Hazardous Substance - CERCLA hazardous substances, pollutants, and contaminants as defined in CERCLA Sections 101(14) and 101(33) .

Headframe - The vertical steel or timber frame at the top of a shaft, which carries the sheave or pulley for the hoist.

Heavy Metal - Principally the metals zinc, copper, cobalt, and lead; however, may include one or more of the following metals: bismuth, cadmium, gold, indium, iron, manganese, mercury, nickel, palladium, silver, thallium, and tin (often included, though not a metal).

Highwall - The unexcavated face of exposed overburden and coal or ore in an open-cast mine or the face or bank on the uphill side of contour strip mine excavation.

Hoist - (1) A drum on which wire rope is wound in the engine house, as the cage or skip is raised in the hOisting shaft. (2) An engine with a drum used for winding up a load from a shaft.

Inclined Shaft or Incline - A non-vertical shaft; usually along the dip of a vein.

Intermittent Stream - A stream or stretch of stream which flows only at certain times of the year when ~ receives water from springs, snow melt or storm runoff.

Jaw Crusher - A primary crusher designed to reduce large rocks or ores to sizes capable of being handled by a secondary crusher. It consists of a moving jaw, hinged at one end, which swings toward and away from a stationary jaw in a regular OSCillatory cycle.

Jig (Mineral Jig) - A machine in which the feed is stratified in water by means of a pulsating motion and from which the stratified products are separately removed, the pulsating motion usually being obtained by alternate upward and downward currents of water .

Latitude - The angular distance north or south from the equator of a point on the earth's surface, expressed in degrees. .

leaching - (1) The removal in solution of the more soluble minerals by percolating waters. (2) Extracting a soluble metallic compound from an ore by selectively dissolving it in a suitable solvent, such as water, • sulfuric acid, hydrochloric acid, cyanide, etc.

legal Description - The Township, Range, Section, and typically quarter/quarter section location.

level - A main underground roadway or passage driven along the level course to afford access to the stopes or workings and to provide ventilation and haulageways for the removal of ore.

loadout - A receptacle for ore awaiting treatment or shipment, also referred to as an ore bin.

longitude - An angular distance east or west from the meridian of some particular place to the prime meridian at Greenwich, England.

MBMG - Montana Bureau of Mines and Geology.

MCl- Maximum contaminant level: Established under the Safe Drinking Water Act.

MClG - Maximum contaminant level goal: Established under the Safe Drinking Water Act.

MDHESlSHWB - Montana Department of Health and Environmental Sciences, Solid and Hazardous Waste Bureau.

MDHESIWQB - Montana Department of Health and Environmental Sciences, Water Quality Bureau.

MDSUAMRB - Montana Department of State lands, Abandoned Mine Reclamation Bureau.

Master Inventory - I nventory of all identifiable abandoned or inactive hardrock mine sites in Montana conducted by the MDSUAMRB.

Mesh - The number of openings per unit area of a screen (sieve).

Mill - A mineral treatment plant in which crushing, grinding, and further processing of ore is conducted to produce a product.

Milling - The processing of ore to produce a product.

Mine - Excavation of earth for the extraction of ore or other economic minerals.

Mine Development - The term used to describe the operations involved in preparing a mine for ore extraction. These operations may include tunneling, sinking, crosscutting, drifting, and raising.

Mineral - An inorganic substance occurring in nature, though not necessarily of inorganic origin, which has (1) a definite chemical composition or, more commonly, a characteristic range of composition, and (2) distinctive physical properties or molecular structure.

Mineral Deposit - A surface or underground body of mineral matter that may be utilized for its industrial mineral or metal content.

Mineral Dressing - Physical and chemical concentration of raw ore into a product from which a metal can be recovered for a profit.

Observed Release - Concentration of hazardous substance(s) has increased significantly (greater than

•

three times) above the background concentration for the site for that specific type of sample. For example, • to document an observed release to surface water, a contaminant concentration detected in a surface water sample collected downstream from a site must exceed the concentration detected in a surface water sample collected upstream from the site by more than three times. See also "Attribution".

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Open Pit Mining - A form of operation designed to extract minerals that lie near the surface .

Open Stope Method - Stoping in which no regular artificial method of support is employed, although occasional props or cribs may be used to hold local patches of insecure ground. Usually confined to relatively small, narrow ore bodies.

Ore - A mineral, or mineral aggregate, containing precious or useful metals, and which occurs in such quantity, grade, and chemical combination as to make extraction commercially profitable.

Ore Bin - A receptacle for ore awaiting treatment or shipment, also referred to as a load out.

Ore Body - A solid and fairly continuous mass of ore, which may include low-grade ore and waste, as well as high-grade material.

Ore Deposit - A general term applied to rocks containing minerals of economic value in such amount that they can be profitably tracted.

Oxidation/Reduction Potential - The hypothetical electron activity at equilibrium. A measurement of the relative tendency (potential) of a solution to accept or transfer electrons, measured in voRs.

PRP - Potentially Responsible Party.

PA No. - Problem Area Number established by the MDSUAMRB.

Perennial Stream - A stream or stretch of a stream that flows continuously throughout the year.

pH - A measure of the degree of acidity or basicity of a solution. At 25°C, a pH of 7 is neutral. Acidity increases as measurements decrease below 7, and basicity increases as measurements increase above 7 .

Placer - A mineral concentration resulting from weathering processes, usually involving water. Placer deposits are typically composed of heavy minerals, w~h gold, platinum, tin, and diamonds being the most important.

Ponded - A condition in which free water covers the soil surface, as in a closed depression.

Portal - (1) The surface entrance to a drift, tunnel, or adit; (2) The entrance to a mine.

Pregnant Solution - Metal-laden solution (cyanide, acid, etc.) resulting from a leach process.

Primary Drainage - The primary drainage is the smallest named stream segment/drainage basin that is locatable on the USGS Hydrologic Unit Map within which the mine site is located.

Prospect - (1) A mineral property, the value of which has not been proved by exploration. (2) Nonproducing mining property under development or considered worthy of such attention.

Pulp - A mixture of ground ore and water capable of flowing through su~bly graded channels as a fluid.

QA/QC - Quality Assurance/Quality Control.

Raise - A vertical or inclined opening driven upward from a level to connect with the level above, or to explore the ground for a limited distance above one level.

Reagent - A chemical or solution used to produce a desired chemical reaction; a substance used in assay or floatation .

Rod Mill - A mill for fine grinding, employing long steel rods to grind the material.

Secondary Drainage - The secondary drainage is the smallest named stream segment/drainage that is locatable on the USGS Quadrangle Map within which the mine site is located.

Sediment - Solid material, both mineral and organic, that is in suspension, is being transported, or has been • moved from its site of origin by air, water, or ice and has come to rest on the earth's surface either above or below the water level.

Sedimentation - The settl'ing of solid particles of soil, coal, or mineral from liquid as a result of gravity or centrifuging,

Shafl- An excavation of limited area compared with its depth, made for access to underground mine workings.

Sluice (Sluice Box) - A long trough-like box set at an incline of about 1 :20 through which placer gravel is carried by a stream of water. The gravel is washed away while most of the gold or other heavy materials are caught by riffles or blankets on the floor of the sluice.

Slurry - Fine solid particles suspended in a liquid, typically water, of a consistency that allows flow by gravity or pumping.

Source - Any area where a hazardous substance has been deposited, stored, disposed, or placed, plus those soils that have become contaminated from migration of a hazardous substance.

Specific Conductance - The specific conductance or conductivity of water (or other substance measured) is the electrical conductance of the material between opposite sides of a cube 1 centimeter in each direction.

Stamp Mill - An apparatus in which rock is crushed by a stamp battery,

Stope - An underground excavation from which ore has been removed.

Subsidence - A sinking down of a part of the earth's surface due to the collapse of underlying underground • openings.

Surface Mining - The mining in surface excavations, including placer mining, mining in open pits, mining and removing ore from open cuts by hand or with mechanical excavating and transportation equipment, and the removal of overburden to uncover the ore.

Tailings - The refuse material resulting from the washing, concentration, or treatment of ground ore.

Tailings Pond - A pond with a constraining wall or dam to which mill effluents are run.

Tunnel - A horizontal or nearly horizontal underground passage that is open to the atmosphere at both ends.

USFS - Unijed States Department of Agriculture, Forest Service.

USGS - United States Department of Interior, Geological Survey.

Waste - The rock that is too low in grade to be of economic value.

Waste Dump (Spoil Pile) - The area where mine wastes or spoil materials are discarded.

Wetlands - Areas that under normal circumstances have hydrophytic vegetation, hydric marshes, and wetland hydrology. It includes landscape units such as bogs, marshes, and lowlands covered with shallow ephemeral or intermittent waters. Permanent waters of streams and water deeper than 9 feet in lakes or reservoirs are not considered wetlands.

Winze - A vertical or inclined opening, or excavation, connecting two levels in a mine, differing from a raise • only in construction. A winze is driven downward and a raise is excavated upward.

X-ray Fluorescence (XRF) Spectrometer - Instrument used for metals analysis of solid media by energy dispersive X-ray fluorescence.

Documents

ABANDONED HARD ROCK MINE PRIORITY SITES 1994 …ABANDONED HARD ROCK MINE PRIORITY SITES 1994 SUMMARY REPORT Prepared For: Montana Department of State Lands ... (LAP) describes laboratory