2-6-06 TPWA Short Course Presentation

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2-6-06 TPWA Short Course Presentation

  1. 1. Implementing an Integrated Storm Water Management Program John P. Nett, P.E., CFM Acting City Engineer Public Works Department City of Killeen Steve Veal, P.E. Principal/Vice-President Fort Worth Public Works and Environmental Services Unit Carter and Burgess, Inc. Presented at the 2006 Annual Public Works Short Course February 6, 2006
  2. 2. Integrated Storm Water Management Elements of an Integrated Storm Water Management Program for City of Killeen <ul><ul><li>Drainage Maintenance Program (Drainage Maintenance Plan) </li></ul></ul><ul><ul><li>Capital Improvements Program (Drainage Master Plan) </li></ul></ul><ul><ul><li>Storm Water Management Program (Storm Water Management Plan) </li></ul></ul><ul><ul><li>Non-Point Source Pollution Assessment Program </li></ul></ul><ul><ul><li>Administrative Solutions </li></ul></ul>
  3. 3. What’s driving the need for improved maintenance of drainage infrastructure? <ul><li>Numerous citizen concerns that include: </li></ul><ul><ul><li>High weeds and grass </li></ul></ul><ul><ul><li>Trash and debris </li></ul></ul><ul><ul><li>Vermin (rodents)/vectors (mosquitoes) </li></ul></ul>Integrated Storm Water Management
  4. 4. What’s driving the need for improved maintenance of drainage infrastructure? <ul><li>Water quality control issues that include: </li></ul><ul><ul><li>Residential activities </li></ul></ul><ul><ul><li>Commercial/business activities </li></ul></ul><ul><ul><li>Construction activities </li></ul></ul><ul><ul><li>Failing septic tanks & SSOs </li></ul></ul>Integrated Storm Water Management
  5. 5. What’s driving the need for improved maintenance of drainage infrastructure? <ul><li>Water quantity control issues that include: </li></ul><ul><ul><li>Increased volumes and velocities </li></ul></ul><ul><ul><li>Backwater flows and flooding </li></ul></ul>Integrated Storm Water Management
  6. 6. Impact of Urbanization On Run-off Quantity Integrated Storm Water Management
  7. 7. Downstream Impacts of Increased Discharges Integrated Storm Water Management
  8. 8. What types of drainage infrastructure are need of maintenance? <ul><li>Utility Easements </li></ul><ul><ul><li>Many UEs also function as DEs </li></ul></ul><ul><li>Rights of way </li></ul><ul><ul><li>Alleys </li></ul></ul><ul><ul><li>Bar ditches </li></ul></ul><ul><li>Drainage Easements </li></ul><ul><ul><li>Concrete features </li></ul></ul><ul><ul><li>Earthen features </li></ul></ul>Integrated Storm Water Management
  9. 9. What are the industry standards for drainage infrastructure maintenance? <ul><li>A multidiscipline approach is required to solve drainage problems </li></ul><ul><ul><li>Engineers, landscapers, geologists, </li></ul></ul><ul><ul><li>botanists, stream scientists </li></ul></ul><ul><li>There are long-term benefits from stable (sustainable) earthen channels and streams </li></ul><ul><ul><li>Decreased costs, maintenance, and flooding </li></ul></ul><ul><ul><li>Increased water quality, aesthetics and value </li></ul></ul>Integrated Storm Water Management
  10. 10. Potential Maintenance Solutions <ul><li>Code Revisions </li></ul><ul><li>Public Education </li></ul><ul><li>Trash/Debris Removal </li></ul><ul><li>Inspection and Abatement </li></ul><ul><li>Design, Construction and Maintenance Standards </li></ul>Integrated Storm Water Management
  11. 11. Code Revisions <ul><li>Variable height vegetation that corresponds with stream classification </li></ul><ul><li>DE widths that correlate with channel flow and velocity </li></ul><ul><li>Plan of action for drainage infrastructure that is not in a DE or an undersized DE </li></ul>Integrated Storm Water Management
  12. 12. Streambank Vegetation Zones Integrated Storm Water Management
  13. 13. Public Education <ul><li>Circulate media that outline program goals to create ownership and “buy in” </li></ul><ul><li>Develop materials for both public and internal use </li></ul>Integrated Storm Water Management
  14. 14. Trash/Debris Removal <ul><li>Dedicate a crew to continuously patrol high-visibility drainage infrastructure </li></ul><ul><li>Establish incentives/disincentives to littering </li></ul><ul><li>Promote an ‘Adopt a Creek’ program </li></ul>Integrated Storm Water Management
  15. 15. Inspection and Abatement <ul><li>Integrate a licensed herbicide applicator to program </li></ul><ul><li>Inspect drainage infrastructure and continually document debris, failures, etc. </li></ul><ul><li>Perform minor repairs (patching; grouting; steelwork; priming/painting) </li></ul>Integrated Storm Water Management
  16. 16. Areas of Inspection & Repair Integrated Storm Water Management
  17. 17. Design, Construction, and Maintenance Standards <ul><li>Dedicate a crew tasked with channel/stream re-construction & maintenance; vegetation & re-vegetation; and mowing & trimming </li></ul><ul><li>Perform heavy brush clearing, channel shaping, tilling & seeding; mowing; trimming, and a variety of hand activities </li></ul><ul><li>Establish 5-year prioritized program for establishing a maintenance baseline within the city’s major tributaries </li></ul>Integrated Storm Water Management
  18. 18. Construction & Maintenance Integrated Storm Water Management
  19. 19. Channel Re-Vegetation Integrated Storm Water Management
  20. 20. Integrated Storm Water Management Example of Integrated Storm Water Design
  21. 21. Example of Integrated Storm Water Design Integrated Storm Water Management
  22. 22. Integrated Storm Water Management Capital Improvements Program <ul><ul><li>The City’s CIP was developed as a part of the 2005 Drainage Master Plan, which </li></ul></ul><ul><ul><li>Summarizes Existing Problems </li></ul></ul><ul><ul><li>Provides a Process for CIP Selection and Development </li></ul></ul><ul><ul><li>Describes Influences that Affect System Operation and Maintenance and the Cost of Implementation </li></ul></ul>
  23. 23. <ul><ul><li>The Drainage Master Plan Report </li></ul></ul><ul><ul><li>Identifies and Prioritizes Potential CIP Projects </li></ul></ul><ul><ul><li>Outlines $8.0 Million Major CIP Bond Package </li></ul></ul><ul><ul><li>Defines Drainage Utility Rate Structure Revisions To Fund CIP, Drainage Maintenance, and Phase II Programs </li></ul></ul>Integrated Storm Water Management Capital Improvements Program
  24. 24. Integrated Storm Water Management Capital Improvements Program
  25. 25. Integrated Storm Water Management Capital Improvements Program
  26. 26. Integrated Storm Water Management TPDES Phase II Program <ul><ul><li>Water Quality Related Plan Developed in Response to TCEQ TPDES Municipal Separate Storm Sewer System (MS4) Permit Requirements </li></ul></ul><ul><ul><li>Revised Draft Permit Issued August 16, 2005 </li></ul></ul><ul><ul><li>Permit Expected to Be Finalized ? ? ? ? </li></ul></ul>
  27. 27. Integrated Storm Water Management <ul><ul><li>What has Killeen done regarding Phase II? </li></ul></ul><ul><ul><li>Completed (…and Ready to Implement) a Storm Water Management Plan (SWMP) </li></ul></ul><ul><ul><li>Managing City-Owned Industrial and Construction Activities under required Permits </li></ul></ul><ul><ul><li>Evaluating Other Provisions that may arise as a result of Nolan Creek water quality studies </li></ul></ul>
  28. 28. Killeen Urbanized Area Integrated Storm Water Management <ul><li>Copperas Cove </li></ul><ul><li>Fort Hood </li></ul><ul><li>Harker Heights </li></ul><ul><li>Killeen </li></ul><ul><li>Nolanville </li></ul><ul><li>Bell County </li></ul><ul><li>Coryell County </li></ul>
  29. 29. Integrated Storm Water Management <ul><li> Required SWMP BMPs: </li></ul><ul><ul><li>- Maintain MS4 Infrastructure Map with Major Outfalls </li></ul></ul><ul><ul><ul><li>- Identify and Eliminate Illicit Connections and Discharges </li></ul></ul></ul><ul><ul><ul><li>- Develop Storm Water Control Ordinances </li></ul></ul></ul>
  30. 30. Integrated Storm Water Management <ul><li> Required SWMP BMPs: </li></ul><ul><ul><li>- Revise Policies and Procedures to Reduce Contaminant </li></ul></ul><ul><ul><li> Contact with Storm Water Runoff </li></ul></ul><ul><ul><ul><li>- Revise Chemical Storage, Disposal and Handling </li></ul></ul></ul><ul><ul><ul><li> Procedures to Minimize Spill Risk </li></ul></ul></ul><ul><ul><ul><li>- Retrofit Selected Existing Facilities </li></ul></ul></ul>
  31. 31. Integrated Storm Water Management <ul><li> Selected Killeen-Specific SWMP BMPs: </li></ul><ul><ul><li>- Program to Eliminate Failing/Failed Septic Systems </li></ul></ul><ul><ul><ul><li>- Household Hazardous Waste Collection Events </li></ul></ul></ul><ul><ul><ul><li>- Brochures on Water Quality Control Issues </li></ul></ul></ul><ul><ul><ul><li>- Stream Monitoring </li></ul></ul></ul>
  32. 32. Integrated Storm Water Management <ul><ul><li>FY 2004-2005 and FY 2005-2006 Non-Point Source Pollution Program Grant Activities </li></ul></ul><ul><ul><li>Monitoring of 14 Sites In South Nolan Creek and Lampasas River Watersheds </li></ul></ul><ul><ul><li>Assessment Focus on Bacteria and Nutrients </li></ul></ul><ul><ul><li>Will Allow Killeen to Characterize Contribution to Water Quality Impairment Before Total Maximum Daily Load Establishment </li></ul></ul>
  33. 33. Integrated Storm Water Management Administrative Solutions <ul><ul><li>Drainage Design Criteria Revisions </li></ul></ul><ul><ul><li>Multi-Criteria Detention Policy </li></ul></ul><ul><ul><li>Regional Participation </li></ul></ul><ul><ul><li>Updated FIS Data </li></ul></ul>
  34. 34. Why incorporate multi-criteria detention and/or additional channel storage capacity? <ul><ul><li>Provide overbank flood protection storage (typical control; 25-Year, 24-Hour Storm Event) </li></ul></ul><ul><ul><li>Introduce valley storage (to alleviate downstream flooding) </li></ul></ul><ul><ul><li>Provide stream channel protection (extended detention for the 1-Year, 24-Hour Storm Event) </li></ul></ul><ul><ul><li>Ensure extreme flood event protection (100-Year Storm Event) </li></ul></ul>Integrated Storm Water Management
  35. 35. Integrated Storm Water Management Updated FIS Data <ul><ul><li>Bell County DFIRM Currently in Process </li></ul></ul><ul><ul><li>Supporting Study Updated 2002 FEMA Flood Insurance Re-Study for Recent Development and Ultimate Development – Ultimate Development Will Cause Significant Increases In Peak Discharges and Flooding Elevations </li></ul></ul>
  36. 36. Integrated Storm Water Management

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