InterLinc: Antelope Creek Watershed Basin Management Plan

Watershed Management | Watershed Stormwater Master Plans | Antelope Creek Watershed Basin Management Plan

Antelope Creek Watershed Basin Management Plan

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Cover and Table of Contents (352 K)

Executive Summary (623 K)

Section 1 – Introduction and Purpose (2.71 M)

1.1. Introduction and Purpose

1.2. Basin Plan Goals and Objectives

Section 2 – Public Participation and Education (153 K)

2.1. Introduction

2.2. Core Work Group

2.3. Advisory Council

2.4. Open House Events

2.5. Stakeholder Meetings

2.6. Newsletter and Website

Section 3 – Watershed Inventory (1.33 M)

3.1. Introduction

3.2. Collection of Existing Information

3.2.1 Physical Setting
3.2.2 Land-Use
3.2.3 Storm Drainage System
3.2.4 Hydrologic and Hydraulic Data

3.3. Historic Water Quality Data

3.4. Existing Water Quality Projects

3.5. DryWeather Survey

3.6. Pollutants and Pollution Sources

3.6.1 Stormwater Permits

3.7. GIS Database

Section 4 – TMDL Assessment (330 K)

4.1. Introduction

4.2. Antelope Creek TMDL

4.3. State and Local Watershed TMDLs

4.4. Pollutants

4.4.1 E. coli
4.4.2 Ammonia
4.4.3 Other Constituents of Concern

4.5. Summary and Conclusions

Section 5 – Water Quality Monitoring (2.78 M)

5.1. Overview of Available Water Quality Data

5.1.1 Historic Data (Primarily 2002-2009)
5.1.2 Recent Data (2010-2011)

5.2. General Water Quality Evaluation Principles

5.3. Historic Water Quality Sampling Results

5.3.1 In-stream Water Quality
5.3.2 DryWeather Storm Drainage System Screening
5.3.3 Stormwater Quality Monitoring
5.3.4 Summary and Conclusions for Historic Monitoring Data

5.4. 2010-2011 Water Quality Monitoring Activities

5.4.1 2010-11 Sampling Program Overview
5.4.2 In-Stream Sampling Results
5.4.3 DryWeather Outfall Investigations and Sampling Results

5.5. Overall Summary and Conclusions

Section 6 – Pollution Sources and Control Strategies (234 K)

6.1 Introduction

6.2. Pollutants

6.2.1 WinSLAMM Setup and Scenarios
6.2.2 WinSLAMM Results – Flow and Pollutant Sources
6.2.3 WinSLAMM Results – BMP Removal Effectiveness

6.3. Structural BMPs

6.3.1 Selection Criteria

6.4. Non-Structural BMPs

6.5. Conclusion

6.6. Recommendations

Section 7 – BMP Site Inventory (2.14 M)

7.1. Introduction

7.2. General Potential BMP Site Selection

7.2.1 Field Screening Potential Sites
7.2.2 Desktop Review of Potential Sites
7.2.3 Develop Watershed Specific Selection Criteria
7.2.4 Rank and Select Potential Project Sites

7.3. Antelope Creek Potential BMP Site Selection

7.3.1 Field Screening
7.3.2 Antelope Creek Desktop Review
7.3.3 Antelope Creek Site Selection Key Criteria List
7.3.4 Antelope Creek Selected Sites

7.4. Non-Structural Sites

7.5. Conclusion

Section 8 – Management Practices – Recommended Projects/Programs (6.41 M)

8.1. Introduction

8.2. Project and Program Selection Overview

8.3. Non-Structural/Programmatic Recommendations

8.3.1 Expansion of Existing Programs
8.3.2 New Programs

8.4. Structural Project Recommendations

8.4.1 Prioritization Methodology
8.4.2 Project Descriptions

Section 9 – Recommendations City-wide (727 K)

9.1. Introduction

9.2. City-wide Recommendation Overview

9.3. City-wide Recommendations

9.4. Developed Watershed Recommendations

9.4.1 Non-structural Recommendations
9.4.2 Structural Recommendations

9.5. Undeveloped Watershed Recommendations

9.5.1 Non-structural Recommendations
9.5.2 Structural Recommendations

Section 10 – Implementation (4.43 M)

10.1. Introduction

10.2. Implementation Overview

10.3. Phased Implementation Strategy

10.3.1 Phase One

10.4. Plan Revisions and Additional Phases

10.5. Structural Demonstration Projects (Basin-wide)

10.6. Other Opportunities

10.7. Implementation Schedule and Milestones

10.8. Monitoring Milestones and Schedule

10.8.1 Sampling at AC-9 – Confluence with Salt Creek
10.8.2 Sub-basin Sampling

10.9. Evaluative Criteria

10.10. Resource Needs

Section 11 - Glossary of Terms And References (57 K)

Glossary of Terms

References

Appendices

Appendix A – Best Management Practices (1.13 M)
Appendix B – Public Information and Education (9.46 M)
Appendix C – Site Prioritization Ranking Worksheets (1.44 M)
Appendix D – Project Prioritization Ranking Worksheets (126 K)
Appendix E – WinSLAMM Standard Land Use Characteristics and Pollutant Sources Report (1.61 M)
Appendix F – WinSLAMM Retrofit Stormwater Management Options Report (526 K)

List of Figures

Figure ES-1: Antelope Creek Location Map
Figure ES-2. Antelope Park Sub-Basin Projects
Figure 1-1. Comprehensive Watershed Management Plan Status
Figure 1-2. Basin Plan Project Area
Figure 1-3. Effective 100-Year Floodplain
Figure 1-4. Antelope Creek Watershed Planning Areas
Figure 3-1. Existing Land Use
Figure 3-2. Storm Drainage System
Figure 4-1. State of Nebraska NDEQ TMDL Listed Water Bodies for Lincoln/Lancaster Co. Area
Figure 4-2. Box and Whisker Plots of Fecal Coliform in Stormwater Data
Figure 5-1. 2009 Antelope Creek In-stream Sampling Locations
Figure 5-2. Monthly E. coli at State Fairgrounds
Figure 5-3. E. coli vs. Flow Data at State Fairgrounds
Figure 5-4. E. coli Sampling Results on Antelope Creek
Figure 5-5. Total Ammonia at State Fairgrounds
Figure 5-6. Chloride at State Fairgrounds
Figure 5-7. Chloride vs. Conductivity at State Fairgrounds
Figure 5-8. Flow Versus Conductivity at State Fairgrounds
Figure 5-9. Selenium vs. Chloride at State Fairgrounds
Figure 5-10. EA Sampling Location Map
Figure 5-11. 2010-2011 Dry Weather Sampling Results for Antelope Creek
Figure 5-12. 2010-2011 Wet Weather Sampling Results for Antelope Creek
Figure 5-13. Flow Conditions During 2010-2011 Sampling Events
Figure 5-14. Comparison of 2010-2011 Flow Estimates to Other Flow Data Collected on Antelope Creek
Figure 5-15. 2010-2011 Boxplots of All 2010-2011 Sampling Results for Antelope Creek
Figure 5-16. Boxplots of Annual Sampling Results for Antelope Creek at the State Fairgrounds (AC-9)
Figure 5-17. 2010-2011 Geometric Mean E. coli Concentrations at AC-1, AC-4 and AC-9
Figure 5-18. 2010-2011 Dry Weather Synoptic Sampling Results for Antelope Creek and Flowing Outfalls
Figure 5-19. 2010-2011 Sediment Sampling Results for Antelope Creek
Figure 7-1. Potential BMP Sites
Figure 8-1. Bridge Locations
Figure 8-2. Project Locations
Figure 8-3. Antelope Park Channel and Wetland Enhancements from Van Dorn to Sheridan Boulevard
Figure 8-4. Channel Enhancements from South Street to Van Dorn Street
Figure 8-5. Bioretention Areas SW of 33rd and South St
Figure 8-6. Antelope Park: A Street to South Street
Figure 8-7. Roberts Park
Figure 8-8. Lincoln Children's Zoo
Figure 8-9. Woods Park
Figure 8-10. Gere Library
Figure 8-11. Eden Park
Figure 8-12. Extended Detention Cell near 60th and South
Figure 8-13. Labyrinth Weir on Antelope Creek
Figure 8-14. Van Dorn Plaza and U.S. Post Office
Figure 8-15. SE of 40th and Capital Parkway
Figure 9-1. Lincoln Future Growth Tier Map
Figure 10-1. Proposed Sub-basin Layout
Figure 10-2. Antelope Park Sub-Basin Phase One
Figure 10-3. Rainfall Frequency for Lincoln Municipal Airport
Figure 10-4. Antelope Park Sub-Basin Projects

List of Tables

Table ES-1. Basin Plan Advisory Council
Table ES-2. Phase One Antelope Creek Basin Implementation Plan
Table 1-1. Antelope Creek 2010 Water Quality Integrated Report
Table 2-1. Basin Plan Core Working Group
Table 2-2. Basin Plan Advisory Council
Table 2-3. Stakeholder Group Action Summary
Table 3-1. Watershed Soil Types
Table 3-2. Detailed Land-Use Summary
Table 3-3. Composite Land-Use Summary
Table 3-4. Summary of Dry Weather Flows
Table 4-1. TMDLs Completed for Nebraska Lakes (NDEQ 2010)
Table 4-2. TMDLs Completed for Nebraska Streams
Table 4-3. Summary of E. coli Data Providing Basis of Lower Platte Basin E. coli TMDLs
Table 5-1. Historic Water Quality Data at State Fairgrounds (2002-2008)
Table 5-2, NDEQ Samples Collected at State Fairgrounds in 2009
Table 5-3. In-stream Sampling Locations on Antelope Creek: E. coli Results
Table 5-4. In-stream Sampling Locations on Antelope Creek: Other Constituents
Table 5-5. Historic NDEQ Fecal Coliform Data at Antelope Creek near Children's Zoo
Table 5-6. Comparison of City of Lincoln Wet Weather Event Mean Concentrations (EMCs) to National Urban Runoff Program (NURP) Data Sets
Table 5-7. Historic Wet Weather Bacteria Data for City of Lincoln (1993)
Table 5-8. Sampling Dates
Table 5-9. In-stream Sampling Locations
Table 5-10. Tributary Sampling Locations
Table 5-11. Water Quality Sampling Parameters
Table 5-12. Antelope Creek Dry Weather Sample Results
Table 5-13. Antelope Creek Wet Weather Sample Results
Table 5-14. E. coli Summary Table (2010-2011)
Table 5-15. Geometric Mean Values Calculated for Locations with Weekly Sampling
Table 5-16. 2011 Summary of In-stream Sediment Samples for Antelope Creek
Table 5-17. Animals Observed During Sampling Events (2010-2011)
Table 6-1. Common Urban Runoff Pollutant Sources
Table 6-2. Typical Land Use Characteristics
Table 6-3. Summary of Major Sources of Flows and Pollutants
Table 6-4. Stormwater BMP Modeling Scenarios
Table 6-5. Relative Land Consumption of Stormwater Controls
Table 6-6. BMPs Ability to Retrofit and Land Requirements
Table 6-7. Groundwater Contamination Potential for Stormwater Pollutants Post-Treatment
Table 6-8. Primary, Secondary, and Incidental Treatment Processes Provided by BMPs
Table 6-9. Overview of Bacteria Control Measures and Expected Cost and Effectiveness
Table 7-1. Potential BMP Sites
Table 7-2. Potential BMP Site Selection Matrix
Table 7-3. Selected BMP Sites
Table 8-1. Non-structural Recommendations
Table 8-2. Proposed Structural Demonstration Projects
Table 8-3. Project Prioritization Ranking
Table 8-4. Annual Pollutant Load Reduction Estimates for AC-P01
Table 8-5. Annual Pollutant Load Reduction Estimates for AC-P02
Table 8-6. Annual Pollutant Load Reduction Estimates for AC-P03
Table 8-7. Annual Pollutant Load Reduction Estimates for AC-P04
Table 8-8. Annual Pollutant Load Reduction Estimates for AC-P05
Table 8-9. Annual Pollutant Load Reduction Estimates for AC-P06
Table 8-10. Annual Pollutant Load Reduction Estimates for AC-P07
Table 8-11. Annual Pollutant Load Reduction Estimates for AC-P08
Table 8-12. Annual Pollutant Load Reduction Estimates for AC-P09
Table 8-13. Annual Pollutant Load Reduction Estimates for AC-P10
Table 8-14. Annual Pollutant Load Reduction Estimates for AC-P11
Table 8-15. Annual Pollutant Load Reduction Estimates for AC-P12
Table 8-16. Annual Pollutant Load Reduction Estimates for AC-P13
Table 9-1. Existing Basin Growth Patterns (acres)
Table 9-2. Existing Basin Growth Patterns (percentage)
Table 9-3. Water Bodies with TMDL Determinations in Lincoln/Lancaster County
Table 10-1. Historic Recreation Season E. coli Geometric Means at AC-9
Table 10-2. Antelope Park Sub-basin Land Use Breakdown
Table 10-3. Antelope Park Sub-basin Water Quality Improvements
Table 10-4. Cost and Load Reduction Estimates
Table 10-5. Phase One Implementation Schedule and Milestones
Table 10-6. Basin Plan Total Cost Estimates