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I 900 850 800 750 700 650 600 550 500 450 400 350 300 250 200 150 Elevation (feet) 900 850 800 750 700 650 600 550 500 450 400 350 300 250 200 150 IMississippi River Fridley Rice Creek 860 840 820 Oo cr sx _w rt sl Osp _j pt _e _tc _tc lower lc se ss nu rt _m xt ce Os lc _sl sc H Elevation (feet) 900 950 850 800 750 700 650 600 550 500 450 400 350 300 250 200 150 900 950 850 800 750 700 650 600 550 500 450 400 350 300 250 200 150 HLino Lakes Blaine Rice Lake Mississippi River Sherman Lake Coon Rapids Reshanau Lake Wards Lake Coon Creek 840 880 860 900 6.81 u Os nu sp sc _tc _tc _tc lower _tc lower _sl _sl u _w se sr _e _j _m xt rt se sx fs fs nu lc ss sc ce _j pt _j _sl rt Osp sl cr sl lc sr sx ce ce xt xt ce ce ce lc _j Oo fs G Elevation (feet) 900 950 850 800 750 700 650 600 550 500 450 400 350 900 950 850 800 750 700 650 600 550 500 450 400 350 GMississippi River Peltier Lake Lochness Park Coon Creek George Watch Lake 880 860 840 880 900 5000 2000 56.6 12.1 94 vt ce ss ce _sl _sl _sl _sl sx cr ce cr Os _j sp se sc xt sp sl _w u rt Oo rt sp lc _j xt _tc _tc _tc _tc lower _tc lower _tc lower rt rt rt lc ce rt _j sl nu sx vt lc u _e nu sc sc fs cr ce ce se xt ce F Elevation (feet) 900 950 850 800 750 700 650 600 550 500 450 400 350 300 900 950 850 800 750 700 650 600 550 500 450 400 350 300 FRondeau Lake Rum River Mississippi River Crooked Lake Bunker Hills Park Lexington Avenue 900 860 840 880 4000 10,000 13.4 11.3 13.4 42.0 41.1 25.6 120* 20,000 32.1* 21.0* 184 lc ce ss sx cr xt ce lc lc ce sp _e _e sp rt sr _tc _w sc ce rt _j u xt rt _j xt rt ce ss u _tc _tc rt cr _tc se _m u pt nu u _sl _sl Oo sl _tc lower _tc lower fs sc nu fs nu _sl ce lc nu ce xt cr se sp cr _tc COUNTY ATLAS SERIES ANOKA COUNTY ATLAS C-27, PART B, PLATE 9 of 9 Hydrogeologic Cross Sections F–Fthrough I–IHydrogeologic Cross Sections By James A. Berg 2016 STATE OF MINNESOTA DEPARTMENT OF NATURAL RESOURCES ECOLOGICAL AND WATER RESOURCES DIVISION Prepared and Published with the Support of the MINNESOTA ENVIRONMENT AND NATURAL RESOURCES TRUST FUND and the CLEAN WATER, LAND AND LEGACY AMENDMENT This map was compiled and generated in a geographic information system (GIS). Digital data products, including chemistry data, are available from the Minnesota Department of Natural Resources (DNR) Ecological and Water Resources Division at http://www.mndnr.gov/waters. This map was prepared from publicly available information. Every reasonable effort has been made to ensure the accuracy of the factual data on which this map interpreta- tion is based. However, the DNR does not warrant the accuracy, completeness, or any implied uses of these data. Users may wish to verify critical information; sources include both the references in the report and information on file in the offices of the Minnesota Geological Survey and the DNR. Every effort has been made to ensure the interpretation shown conforms to sound geologic and cartographic principles. This map should not be used to establish legal title, boundaries, or locations of improvements. Base modified from Minnesota Geological Survey, Anoka County Geologic Atlas, Part A, 2013. Universal Transverse Mercator projection, zone 15N, North American Datum of 1983. North American Vertical Datum of 1988. GIS and cartography by James A. Berg and Holly Johnson. Edited by Ruth MacDonald. GEOLOGIC ATLAS OF ANOKA COUNTY, MINNESOTA The DNR Information Center Minnesota Department of Natural Resources Ecological and Water Resources Division 500 Lafayette Road St. Paul, MN 55155-4025 For more information call 651-296-6157 or 888-646-6367 http://www.mndnr.gov/waters This information is available in alternative format on request. The Minnesota DNR prohibits discrimination in its programs and services based on race, color, creed, religion, national origin, sex, public assistance status, age, sexual orientation or disability. Persons with disabilities may request reasonable modifications to access or participate in DNR programs and services by contacting the DNR ADA Title II coordinator at [email protected] or 651-259-5488. Discrimination inquiries should be sent to Minnesota DNR, 500 Lafayette Road, St. Paul, MN 55155-4049; or Office of Civil Rights, U.S. Department of the Interior, 1849 C Street NW, Washington, DC 20240. © 2016, State of Minnesota, Department of Natural Resources and the Regents of the University of Minnesota LOCATION DIAGRAM 45°15' N. 45°22'30" N. 93°30' W. 93°15' W. 93°22'30" W. 93°07'30" W. 45°07'30" N. ) 610 10 ) 47 ) 47 ) 65 ) 242 35W 35E 694 Columbia Heights Anoka Centerville St. Francis Circle Pines B C D E F G H A BB BCC CDD DEE EFF FGHI IAA A1 0 1 2 3 4 SCALE 1:300 000 1012 45678 3 9 KILOMETERS 5 MILES Symbols Part B line of cross section shown on this plate Well used to generate cross section F FPart B line of cross section not shown on this plate A APart A line of cross section A A1 0 1 2 3 4 5 MILES 1 0 1 2 4 5 6 7 8 3 9 KILOMETERS SCALE 1:100 000 VERTICAL EXAGGERATION X 50 CROSS SECTION EXPLANATION Groundwater flowpath is unknown. Groundwater flows laterally. Tritium concentrations may be artificially elevated by high capacity pumping. Groundwater moves from an overlying buried aquifer to an underlying buried aquifer. Groundwater conditions Groundwater moves from an overlying surficial aquifer to a buried aquifer. If shown, chloride concentration equals or exceeds 5 parts per million. (* indicates naturally elevated values) 41.1 If shown, groundwater residence time in years as estimated by carbon-14 ( 14 C) isotope analysis. 3000 Symbols and labels Lake Land or bedrock surface General groundwater flow direction Geologic contact Approximate equipotential contour; contour interval 20 feet 900 Water table Direction of fault movement, arrows indicate relative movement Tritium age Darker color in small vertical rectangle (well screen symbol) indicates tritium age of water sampled in well. Lighter color indicates interpreted age of water in aquifer. Mixed: water is a mixture of recent and vintage waters (greater than 1 TU to less than 8 TU). Vintage: water entered the ground before 1953 (less than or equal to 1 TU). Recent: water entered the ground since about 1953 (8 to 15 TU). Cold War era: water entered the ground during the peak period of atmospheric tritium concentration during nuclear bomb testing, 1958–1959 and 1961–1972 (greater than 15 tritium units [TU]). If shown, arsenic concentration equals or exceeds 10 parts per billion. 13.4 Well not sampled for tritium. Groundwater discharges to a surface-water body. Quaternary aquitards Grouped by texture ranging from highest to lowest sand content indicating relative hydraulic conductivity. Hydrogeologic unit code Percent sand cr, ce, rt, lc (sandy) nu xt, pt lc > 60% > 40% and 50% > 30% and 40% ≤ 30% sl sc se sx sr sp Undifferentiated sediment (u) ss Aquifers and aquitards grouped by stratigraphy Surficial sand Buried sand and gravel and Quaternary sediment Bedrock St. Peter Shakopee Oneota Dolomite* Jordan St. Lawrence Formation* Upper Tunnel City Lower Tunnel City* Wonewoc Eau Claire Formation* Mt. Simon (not shown in areas where data were not available) Enhanced-permeability zone near the bedrock surface Osp Os Oo _j _sl _tc _w _e _m Interpreted tritium age is indicated by background color Interpreted tritium age is indicated by pattern color _tc lower *aquitard

860 880 2000 Hydrogeologic Cross Sections 5000 880 By James … · I 900 850 800 750 700 650 600 550 500 450 400 350 300 250 200 150 900 850 800 750 700 650 600 550 500 450 400 350

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Page 1: 860 880 2000 Hydrogeologic Cross Sections 5000 880 By James … · I 900 850 800 750 700 650 600 550 500 450 400 350 300 250 200 150 900 850 800 750 700 650 600 550 500 450 400 350

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45°15' N.

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COUNTY ATLAS SERIESANOKA COUNTY

ATLAS C-27, PART B, PLATE 9 of 9Hydrogeologic Cross Sections

F–F’ through I–I’

Hydrogeologic Cross SectionsBy James A. Berg

2016

STATE OF MINNESOTADEPARTMENT OF NATURAL RESOURCESECOLOGICAL AND WATER RESOURCES DIVISION

Prepared and Published with the Support of the MINNESOTA ENVIRONMENT AND NATURAL RESOURCES TRUST FUND

and the CLEAN WATER, LAND AND LEGACY AMENDMENT

This map was compiled and generated in a geographic information system (GIS). Digital data products, including chemistry data, are available from the Minnesota Department of Natural Resources (DNR) Ecological and Water Resources Division at http://www.mndnr.gov/waters.This map was prepared from publicly available information. Every reasonable effort has been made to ensure the accuracy of the factual data on which this map interpreta-tion is based. However, the DNR does not warrant the accuracy, completeness, or any implied uses of these data. Users may wish to verify critical information; sources include both the references in the report and information on file in the offices of the Minnesota Geological Survey and the DNR. Every effort has been made to ensure the interpretation shown conforms to sound geologic and cartographic principles. This map should not be used to establish legal title, boundaries, or locations of improvements.Base modified from Minnesota Geological Survey, Anoka County Geologic Atlas, Part A, 2013.Universal Transverse Mercator projection, zone 15N, North American Datum of 1983. North American Vertical Datum of 1988.GIS and cartography by James A. Berg and Holly Johnson. Edited by Ruth MacDonald.

GEOLOGIC ATLAS OF ANOKA COUNTY, MINNESOTA

The DNR Information Center

Minnesota Department of Natural ResourcesEcological and Water Resources Division500 Lafayette RoadSt. Paul, MN 55155-4025For more information call 651-296-6157 or 888-646-6367http://www.mndnr.gov/waters

This information is available in alternative format on request.

The Minnesota DNR prohibits discrimination in its programs and services based on race, color, creed, religion, national origin, sex, public assistance status, age, sexual orientation or disability. Persons with disabilities may request reasonable modifications to access or participate in DNR programs and services by contacting the DNR ADA Title II coordinator at [email protected] or 651-259-5488. Discrimination inquiries should be sent to Minnesota DNR, 500 Lafayette Road, St. Paul, MN 55155-4049; or Office of Civil Rights, U.S. Department of the Interior, 1849 C Street NW, Washington, DC 20240.

© 2016, State of Minnesota, Department of Natural Resourcesand the Regents of the University of Minnesota

LOCATION DIAGRAM

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45°15' N.

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45°07'30" N.)610

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CROSS SECTION EXPLANATION

Groundwater flowpath is unknown.

Groundwater flows laterally.

Tritium concentrations may be artificially elevated by high capacity pumping.

Groundwater moves from an overlying buried aquifer to an underlying buried aquifer.

Groundwater conditionsGroundwater moves from an overlying surficial aquifer to a buried aquifer.

If shown, chloride concentration equals or exceeds 5 parts per million. (* indicates naturally elevated values)

41.1

If shown, groundwater residence time in years as estimated by carbon-14 (14C) isotope analysis.

3000

Symbols and labels

Lake

Land or bedrock surface

General groundwater flow direction

Geologic contact

Approximate equipotential contour; contour interval 20 feet900

Water table

Direction of fault movement, arrows indicate relative movement

Tritium ageDarker color in small vertical rectangle (well screen symbol) indicates tritium age of water sampled in well. Lighter color indicates interpreted age of water in aquifer.

Mixed: water is a mixture of recent and vintage waters (greater than 1 TU to less than 8 TU).

Vintage: water entered the ground before 1953 (less than or equal to 1 TU).

Recent: water entered the ground since about 1953 (8 to 15 TU).

Cold War era: water entered the ground during the peak period of atmospheric tritium concentration during nuclear bomb testing, 1958–1959 and 1961–1972 (greater than 15 tritium units [TU]).

If shown, arsenic concentration equals or exceeds 10 parts per billion.13.4

Well not sampled for tritium.

Groundwater discharges to a surface-water body.

Quaternary aquitardsGrouped by texture ranging from highest to lowest sand content indicating relative hydraulic conductivity.

Hydrogeologic unit code Percent sandcr, ce, rt, lc (sandy)nuxt, ptlc

> 60%

> 40% and ≤ 50%

> 30% and ≤ 40%

≤ 30%

slscsesxsrspUndifferentiated sediment (u)

ss

Aquifers and aquitards grouped by stratigraphy

Surficial sand

Buried sand and gravel and Quaternary sediment

Bedrock St. Peter

Shakopee

Oneota Dolomite*

Jordan

St. Lawrence Formation*

Upper Tunnel City

Lower Tunnel City*

Wonewoc

Eau Claire Formation*

Mt. Simon (not shown in areas where data were not available)

Enhanced-permeability zone near the bedrock surface

Osp

Os

Oo

_j

_sl

_tc

_w

_e

_m

Interpreted tritium age is indicated by background color

Interpreted tritium age is indicated by pattern color

_tclower

*aquitard