LCRA Highland Lakes Watershed Ordinance Performance Standards Overview.
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Transcript of LCRA Highland Lakes Watershed Ordinance Performance Standards Overview.
![Page 1: LCRA Highland Lakes Watershed Ordinance Performance Standards Overview.](https://reader035.fdocuments.us/reader035/viewer/2022062304/56649d825503460f94a676f5/html5/thumbnails/1.jpg)
LCRA Highland Lakes Watershed Ordinance
Performance Standards Overview
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How Does Stormwater Pollution Affect Our Waterways?
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
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HLWO Jurisdictional Area
Travis County (Lake Travis Watershed)
Llano County (portion)
Burnet County (Colorado River Watershed)
Total Area 1,172 sq. mi.
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What is regulated?
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
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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 specificationsControl
• Water Quality Education Contact LCRA to initiate education program
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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
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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
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Marble Falls – Edwards Offices
Stand-alone bioretention basin Vegetated filter strip for driveway
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Marble Falls – RSC Equipment – ED pond with secondary bioretention
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Questions ??Contacts
LCRA Watershed Engineering & Planning512-473-3200 Ext. 2324
Supervisor: Erik Harris, P.E. Ext. 2091
Permit Review: Adam Boatright, P.E. Ext. 4080Dean Thomas, P.E. Ext. 2892
Inspections: Supervisor: David Williams Ext. 3597Mark Neuman – North Ext. 2518Brian Box - South Ext. 3303 Melissa Gabriel –Maintenance Ext. 2838
www.lcra.org Go to “Water” then “Quality”, then select “Watershed Management Ordinance”