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LCRA Highland Lakes Watershed Ordinance

LCRA Highland Lakes Watershed Ordinance. Performance Standards Overview. Siltation of creeks and reservoirs Reduced fish and wildlife habitat Algal blooms and fish kills Increased growth of aquatic weeds Reduced recreational opportunities because of bacterial contamination

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LCRA Highland Lakes Watershed Ordinance

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  1. LCRA Highland Lakes Watershed Ordinance Performance Standards Overview

  2. Siltation of creeks and reservoirs Reduced fish and wildlife habitat Algal blooms and fish kills Increased growth of aquatic weeds Reduced recreational opportunities because of bacterial contamination Contamination of food and water sources How Does Stormwater Pollution Affect Our Waterways?

  3. Travis County (Lake Travis Watershed) Llano County (portion) Burnet County (Colorado River Watershed) Total Area 1,172 sq. mi. HLWO Jurisdictional Area

  4. Development (single family, subdivisions, multi-family, and commercial) that adds more than 10,000 sq. ft. of impervious cover or disturbs more than 1 acre of land Mine or Quarry projects that create more than 10,000 sq. ft. of impervious cover or disturb more than 5 acres of land Utility line construction and maintenance Dredge and Fill Standards (No permit required) Exemptions No Permit Required What is regulated?

  5. HLWO Performance Standards Performance Standards Minimum Requirements • Pre-development Planning Meeting with LCRA staff to review project • Water Quality Management Plan showing drainage layout and BMP design information • Buffer Zones Plan showing buffer zones for creeks, and buffer zone protection measures • Construction- Phase Construction-phase erosion control plan with Erosion and Sediment details and specifications Control • Water Quality Education Contact LCRA to initiate education program

  6. Permanent BMPs to Manage Hydrology and Water Quality • Design objective – manage Streambank Erosion and Stormwater Pollutant Removal by intercepting and treating a water quality volume • Design Storm – 1 year, 3 hour – 1.93” • BMP Suites- primary and secondary BMPs • Primary BMPs (water quality basins) • Secondary BMPs (filter strips & infiltration devices) • BMPs placed in series to manage channel erosion and treat runoff quality • Pollutant removal performance – remove 70-75% of TSS, TP, oil and grease

  7. Permanent Water Quality Basins • Bioretention basins (stand – alone) • Extended detention basins* • Sand filters* • Wet ponds (stand-alone with vegetated bench) • Wetland basins • Retention – irrigation (stand – alone) • Infiltration systems (secondary only) *must be combined with a secondary BMP

  8. Marble Falls – Edwards Offices Stand-alone bioretention basin Vegetated filter strip for driveway

  9. Marble Falls – RSC Equipment – ED pond with secondary bioretention

  10. Questions ?? Contacts LCRA Watershed Engineering & Planning 512-473-3200 Ext. 2324 Supervisor: Erik Harris, P.E. Ext. 2091 Permit Review: Adam Boatright, P.E. Ext. 4080 Dean Thomas, P.E. Ext. 2892 Inspections: Supervisor: David Williams Ext. 3597 Mark Neuman – North Ext. 2518 Brian Box - South Ext. 3303 Melissa Gabriel –Maintenance Ext. 2838 www.lcra.org Go to “Water” then “Quality”, then select “Watershed Management Ordinance”

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