Lake Granbury Watershed Protection Plan

1,062 views

Published on

Presentation at the TWCA mid year conference 2012 www.twca.org

Tim Osting, RPS-Espey
Tiffany Morgan, Brazos River Authority

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
1,062
On SlideShare
0
From Embeds
0
Number of Embeds
283
Actions
Shares
0
Downloads
2
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Lake Granbury Watershed Protection Plan

  1. 1. Brazos River Au th ority Lake Granbury Watershed Protection Plan Tim Osting, RPS-Espey Tiffany Morgan, Brazos River Authority
  2. 2. PurposeBrazos River Au th ority • Restore and maintain the environmental integrity of Lake Granbury and its canals • Reduce bacterial concentrations that do not meet State water quality standards or stakeholder goals – developed by local stakeholders – voluntary, non-regulatory water resource management – local regulations and ordinances
  3. 3. Status of WPPBrazos River Au th ority • TCEQ approved on August 10, 2010 • EPA accepted WPP on May 3, 2011
  4. 4. Nine Elements of a WPPBrazos River Au th ority 1. Identification of Causes and Sources of Impairment 2. Expected Load Reductions from Management Measures 3. Proposed Management Measures 4. Technical and Financial Assistance Needs 5. Information, Education and Public Participation Component 6. Schedule for Implementing Management Measures 7. Interim Milestones for Implementation 8. Criteria for Determining Load Reductions and Water Quality Improvement 9. Load Reduction and Water Quality Monitoring Component
  5. 5. Water Quality GoalBrazos River Au th ority • State E. coli Standard –126 MPN/100mL – Geometric mean of data for site – 8 gastroenteritis illnesses per 1000 swimmers • Stakeholder E. coli Goal - 53 MPN/100mL – Geometric mean of each canal – Reduces the acceptable gastroenteritis rate between 4-5 illnesses per 1000 swimmers – 75th percentile of all E. coli data collected on compliant Lake Granbury coves from 2002 through 2007 – More protective than the state standards – Ensure protective conditions in the future
  6. 6. Source Identification MethodsBrazos River Au th ority • Water quality monitoring • Land-use analysis – Aerial Photography – Soil Suitability Rating for Septic Absorption Fields – Age of Subdivisions – Population and Livestock Counts • Bacterial Source Tracking • Waterfowl Counts • Water Quality Modeling – Watershed Modeling – Lake and Cove Modeling
  7. 7. Land Use Analysis – Identify Potential SourcesBrazos River Au th ority
  8. 8. SELECT – Watershed-based approach to identifying most likelyBrazos River Au th ority sources of bacteria
  9. 9. Circulation in constructed canalsBrazos River Au th ority Port Ridglea East - Dye released on 02/21/2008 3 hours after releasing 22 hours after releasing 30 hours after releasing
  10. 10. Source Identification Results by AreaBrazos River Au th ority Area Most likely sources Rolling Hills Shores 62% Septic, 38% Cattle, <1% Pets,<1%Deer Arrowhead Shores 99% Septic, <1% Pets, <1% Deer Oak Trail Shores 54% Septic, 46% Pets Sky Harbor 82% Cattle, 13% Septic, 4% Pets, 2% Feral Hog Nassau Bay II 98% Septic, 2% Pets Waters Edge Very low potential; Pets Ports O’ Call >99% Septic, <1% Pets Indian Harbor Cove 99% Septic, 1% Pets Indian Harbor Canal 98% Septic, 2% Pets Port Ridglea East >99% Septic, <1% Pets Blue Water Shores Pets Long Creek - Watershed 98% Cattle, 2% Feral Hog, <1% Pets, <1% Deer Long Creek - Cove >99% Septic, <1% Pets Walnut Creek 96% Cattle, 2% Feral Pets, <1% Pets, <1% Deer McCarthy Branch 94% Cattle, 3.5% Pets, 2% Feral Hog, <1% Septic
  11. 11. E. Coli Reductions Needed to Meet Stakeholder GoalBrazos River Au th ority Area % E. coli Reduction Port Ridglea East 27 Oak Trail Shores 24 Sky Harbour 16 Indian Harbor 24 Walnut Creek 57 Long Creek 66
  12. 12. Management Measure AlternativesBrazos River Au th ority Equivalent % Reduction Time to Annual Cost Bacteria Implement Area BMP Alternative index Regional Wastewater Treatment (include neighboring areas) 99% 10-15 yrs 0.54 Regional Wastewater Treatment 99% 10-15 yrs 0.65 Port Ridglea East Septic System Replacement 75% <1 yr 1.00 236 units Cove Circulation Systems (Fountains, etc) 30% 1-2 yrs 0.30 Septic Maintenance Pump-out pilot program <1 yr Septic Maintenance and Education <1 yr Pet Waste Education <1 yr Urban Education on Fertilizer Application 1-2 yrs Waterfowl and Wildlife Feeding Ordinances 1-2 yrs Area Conservation Plan and Education for small acreage land owners 2-5 yrs
  13. 13. Priority Management MeasuresBrazos River Au th ority 1. Watershed Coordinator 2. Regional wastewater collection and treatment A. Supports regional wastewater treatment options over on-site sewage facilities (septic systems) B. Implementation of the Port Ridglea East collection system is a particular priority 3. Pursue funding for all management measure alternatives 4. Implementation of Community Education and Management
  14. 14. Priority Management MeasuresBrazos River Au th ority 5. Support record keeping activities to assist Hood County Health Department (HCHD) ensure compliance with health codes 6. Support development of HOA rules requiring new development and expansion projects to consult with HCHD
  15. 15. Priority Management MeasuresBrazos River Au th ority 7. Implement regional wastewater collection and treatment –priority areas, in order of importance A. Improvements in Progress - Port Ridglea East B. Existing Infrastructure Nearby 1. Oak Trail Shores 2. Sky Harbor 3. Areas surrounding Port Ridglea East, including Port Ridglea West, Nassau Bay II, Sandy Beach, Holiday Estates C. No Existing Infrastructure Nearby 1. Indian Harbor and surrounding areas 2. Rolling Hills Shores and surrounding areas D. Existing Infrastructure in need of improvement 1. Blue Water Shores 2. DeCordova Estates near Lusk Branch
  16. 16. Priority Management MeasuresBrazos River Au th ority 8. Improve cove circulation A. Indian Harbor B. Oak Trail Shores C. Sky Harbor
  17. 17. Hypothetical E. coli Loading and Reductions Due to ManagementBrazos River Au th ority Measure Implementation
  18. 18. Funding • SuccessfulBrazos River Au th ority implementation is dependent on funding • Some measures will require significant funding – Implementation – Sustainability • Others measures need minor adjustments to current activities. • Traditionally, funding is available at the federal, state and local levels of government
  19. 19. Hypothetical Funding Needs and Firm Stakeholder Commitments forBrazos River Au th ority Implementation of Management Measures *additional stakeholder commitments have been made but are dependent on receipt of grants and/or low-interest loans, on bond issuance and are not reflected in this chart
  20. 20. Education and Outreach Plan • Public awarenessBrazos River Au th ority regarding water quality • Natural resource literacy • Identify groups conducting environmental education programs. • Contaminant sources • Best management practices • Pursue sources of funding for water quality education and outreach
  21. 21. E. coli Concentrations in a Granbury CanalBrazos River Au th ority
  22. 22. Schedule for ImplementationBrazos River Au th ority • Implementation schedule dependent on securing appropriate resources • 20+ years • Implementation began in late 2011
  23. 23. E. coli targets at selected intervals through implementationBrazos River Au th ority Oak Trail Sky Port Indian Long Walnut Year Shores Harbor Ridglea Harbor Creek Creek East 2011 70 63 73 71 156 124 2015 65 55 65 60 100 100 2020 60 53 60 55 75 75 2025 53 53 53 53 53 53
  24. 24. Implementation to DateBrazos River Au th ority • Brazos River Authority – NPS 319 Grant – Watershed Coordinator – AgriLife Research – Education and Outreach Program in progress – Monthly meetings with WPP Executive Committee • Acton Municipal Utility District – Extending sewer service in phases to Port Ridglea East – TWDB CWSRF • More Information on Implementation – Clint Wolfe of Texas AgriLife Research and Extension Center - Dallas – c-wolfe@tamu.edu
  25. 25. Final ReportBrazos River Au th ority • Available at: – http://www.brazos.org/gbWPP_Reports.asp

×