24
Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting August 11, 2014

Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting

  • Upload
    joelle

  • View
    38

  • Download
    0

Embed Size (px)

DESCRIPTION

Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting. August 11, 2014. AGENDA. Provide project status update Debrief public meetings Refine the planning and outreach process for next and remaining phases of project - PowerPoint PPT Presentation

Citation preview

Page 1: Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting

Left Hand Creek Watershed Master PlanningLeft Hand Creek Coalition Meeting

August 11, 2014

Page 2: Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting

2

AGENDA

Provide project status update

Debrief public meetings

Refine the planning and outreach process for next and remaining phases of project

Updates: funding, possible partnerships for implementation

Next steps

Page 3: Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting

3

Project Status Update

Work plan

Field work/assessments

Data analysis

Outreach

Project schedule

Refinements

Page 4: Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting

4

Data Sources Data sources used include:

Existing plans from James Creek Watershed Initiative, Lefthand Watershed Oversight Group, Left Hand Water District, Boulder County, and Town of Jamestown

Jamestown Stream Corridor Master Plan Technical Memorandum

Studies and data from NOAA, NWS, CWCB, CDOT, and NRCS

Boulder County Riparian Inventory

News articles for historical data

USFWS memos on endangered species

GIS data and maps

Public meeting materials from December 2013

Data from FRPIC

Descriptions of other projects in the watershed

Page 5: Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting

5

Examples from Annotated BibliographyTitle Author Date Summary

Exceedence Probability Analysis for the Colorado Flood Event, 9 - 16 September 2013

Hydrometeorological Design Studies Center, NWS, NOAA 9/17/2013

Hydrometeorological Design Studies Center (HDSC) developed maps showing annual exceedance probabilities (AEPs) of the worst case rainfall for the Colorado event that started on 9 September 2013…The Colorado event delivered total rainfall amounts that exceeded 15 inches in some locations as it slowly moved through the area and caused extensive river flooding. For sub-hourly durations, the probability that a measured amount from Justice Center could be exceeded in any year was above 10%; probabilities rapidly decrease with duration and reach 1/1000 at 24-hour. The accumulated rainfall continues increasing through 7 days, and corresponding AEPs are less than 1/1000, but they remain below the 95% confidence limit for the 1/1000 AEP for all durations up to 4 days.

CDOT/CWCB Hydrology Investigation Phase One - 2013 Flood Peak Flow Determinations

Kevin Houck, Chief, CWCB Watershed and Flood Protection Service 1/21/2014

Memo to CDOT Incident Command. CWCB and CDOT measured peak flows from the 2013 flood, compared to regulatory discharges published in the Flood Insurance Study (FIS) for each county, as prepared by FEMA. Watersheds studied included the South Platte River, Coal Creek, Boulder Creek, St. Vrain River, Little Thompson River, and the Big Thompson River. Hydraulic characteristics of many rivers were drastically changed by the flood event. NOAA updated design rainfall information for the first time in 40 years. A large volume of data was obtained during and immediately after the flood event, including gridded rainfall, soils and land use information, reservoir releases during the flood, LIDAR topography, and direct and indirect flow measurements. The CWCB hydrology team determined that this was an appropriate time to restudy basin hydrology at the watershed level.

Watershed Management Plan for the Upper Lefthand Creek Watershed, Boulder County, Colorado

Lefthand Watershed Oversight Group 8/10/2005

This Watershed Plan is intended to be a galvanizing tool to bring together diverse watershed stakeholders towards meeting the objectives of the LWOG. The plan provides details on general watershed information, water quality data collection and management, water quality concerns, metals and mining, prioritization of mine sites for cleanup, best management practices, and funding alternatives.

Endangered Species Act Compliance on Flood-Related Projects and Platte River Depletions Following the September 2013 Flood Event USFWS 4/14/2014

This announcement alerts property owners that USFWS temporarily waived Section 7 consultation requirements on all September 2013 flood-related projects resulting in depletions to the Platte River system in Colorado. This waiver is authorized through Spring 2015 runoff.

Page 6: Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting

6

Project Schedule

Week Beginning 9-Jun 16-Jun 23-Jun 30-Jun 7-Jul 14-Jul 21-Jul 28-Jul 4-Aug 11-Aug 18-Aug 25-Aug 1-Sep 8-Sep 15-Sep 22-Sep 29-Sep 6-Oct 13-Oct 20-Oct 27-Oct 3-Nov 10-NovDay 0 7 14 21 28 35 42 49 56 63 70 77 84 91 98 105 112 119 126 133 140 147 154

Task Week # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 231

DeliverablesProject Kickoff 6/11

Develop Project Activities, Milestones and Schedule RoadmapLeft Hand Creek Coalition Meeting Summaries

2Deliverables

Develop and Maintain Project WebsiteAgency, Stakeholder and Public Meeting Summaries

Public Information MaterialsCompile Draft Master Plan Comments

Summary of Planning Issues, Input and Activities

3Deliverables

Existing Conditions Analysis and Recommendations ReportSummary of Existing Plans

4

5Deliverables

Creek Evaluation100-yr Floodplain Maps

Geomorphic MapsRisk Analysis and Recommendations

6Deliverables

List of Strategies for the Draft Master PlanPlan Frameworks

Conceptual Level Diagram Maps

7Deliverables

Project Recommendations/ Priority ListFinal Implementation Plans

8DeliverablesDraft Report 9/11Final Report 11/14

Identify Plan Strategies, Frameworks, and Alternatives

Project Prioritization and Implementation

Draft and Final Left Hand Creek Watershed Master Plan (DRAFT PLAN REVIEW)

Project Management and Coordination

Agency, Stakeholder, and Public Engagement

Existing Plans and Post-Flood Conditions

Data Collection

Creek Corridor Evaluation and Risk Assessments

Page 7: Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting

7

Project Workplan

See Handout

Page 8: Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting

8

Project Status Update (cont.)

Refinements to work plan (including outreach) and schedule

Page 9: Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting

9

Website LHCC mtg agendas, presentations, summaries Project updates – mtg summaries, flyers, photos,

description/summary for each project ‘phase’ Online survey about values/vision, plan focus areas Flood-recovery resources

•Email ‘blasts’ and other Key information Directing people to website for updates Business cards with project info/website distributed at

public meetings, events

LHMP Community Engagement/Outreach

Page 10: Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting

10

Prior to public meetings Announcement/flyer posted on websites Flyer emailed to BoCo flood listserv Flyer emailed to LHCC to distribute Flyer emailed to project list (FRPIC contacts, Dec. ‘13 mtg

attendees, quicktopic/neighborhood listservs) BoCo postcard Press release Reminder emails to project list, neighborhood leaders

LHMP Community Engagement/Outreach

Page 11: Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting

11

LHMP emails/calls received by project team

12 email comments/questions received and responded to Most with questions about master plan, meetings, and for more info4 about site-specific issues

3 calls received and responded to Questions about master plan, meetings, and for more info

Page 12: Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting

12

Lower LH public meeting Altona Grange, 7/31

52 signed in, 26 comment cardsQs focused on data considered; sediment/debris;

stewardship, monitoring & private property issues; two-way communication with County

4 small groups. Values/issues :Value of natural/riparian setting, historical legacy of

Creek, legacy of farming, wildlife habitat, flowing riverIssues: sediment/WQ, debris, flood mitigation,

emergency preparedness, long-term stewardship and watershed monitoring, culverts/bridges, sustainable Ag

Page 13: Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting

13

Upper LH public meeting Greenbriar, 8/6

58 signed in, 22 comment cardsQs focused on managing sediment, debris

flows, roads, water quality, USFS/CDOT involvement, culverts and bridges

4 small groups. Values/issues:Value of natural setting, wildlife habitat/corridor, privacy, tranquility and quality of life, recreation

Issues: flood mitigation, rebuilding roads and bridges, foot paths, mitigating debris flows, septic/WQ issues, floodplain decisions, property lines obscured, utilities problems, emergency preparedness

Page 14: Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting

14

Debrief Public MeetingsLower Watershed Survey Results (26 surveys)

Most important values included: Farming/irrigation

Water quality

Natural setting/quality of life

Most important projects included: Enhancing long-term oversight of watershed

Improving stewardship

Mitigating debris flows

Mitigating risk of private property damage from future flooding

Mitigating risks to personal safety

Ensuring/enhancing water quality

Restoring aquatic/riparian habitat

Restoring natural stream corridor

Page 15: Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting

15

Debrief Public MeetingsUpper Watershed Survey Results (22 surveys)

Most important values included: Ecosystem health/habitat

Water quality

Natural setting/quality of life

Most important projects included: Ensuring/enhancing water quality

Restoring aquatic/riparian habitat

Mitigating risks to personal safety

Restoring natural stream corridor

Reducing sediment/silt transport

Mitigating risk of private property damage from future flooding

Mitigating debris flows

Page 16: Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting

16

Funding, Partnerships, & Implementation

CWCB creek restoration awardsBoCo, Left Hand Water, and Stephen Strand

Coalition funding challenges

Possible partnershipsTrout Unlimited

Urban Drainage and Flood Control DistrictDo we need to contact/interview these

agencies?

Implementation issues

Page 17: Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting

17

Expected Outcomes vs Long-Term Goals

Long-term watershed coalition/network

For funding, projects and stewardship

CWCB/state focus and funding

LWOG existing/future role

Water rights and delivery issues

Page 18: Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting

18

Next Steps

Fieldwork for Risk Assessments25 Identified ReachesHope to complete work in 1 week

Page 19: Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting

19

Next Steps

Fieldwork for Risk Assessments

Right of Entry

DEM of Difference

Page 20: Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting

20

Next Steps

Fieldwork for Risk Assessments

Page 21: Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting

21

Next Steps

Flood Risk AssessmentObtained interim flood surface from VardaSorting through issues associated with that workSuspect hydrology

Used flows for LH at Longmont to model reaches west of 36

Uncertain cross section geometry?Models by Baker and NRCS showing different results but

use same hydrology

Page 22: Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting

22

Next Steps

EcosystemThe application of the SVAP2 protocol

includes the evaluation of features in the stream system that affect overall stream conditions and generally encompass the following categories: Channel stability (channel condition, bank

condition)Water quantity (hydrologic alteration)Water quality (nutrient enrichment and

manure/human waste)Vegetation (riparian area quantity/quality and

canopy cover)Instream habitat (pools, habitat complexity,

embeddedness)

Page 23: Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting

23

Next Steps

Page 24: Left Hand Creek Watershed Master Planning Left Hand Creek Coalition Meeting

Questions and comments?