Lcra highland lakes watershed ordinance
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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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Lcra highland lakes watershed ordinance

LCRA Highland Lakes Watershed Ordinance

Performance Standards Overview


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

How Does Stormwater Pollution Affect Our Waterways?


Hlwo jurisdictional area

Travis County (Lake Travis Watershed)

Llano County (portion)

Burnet County (Colorado River Watershed)

Total Area 1,172 sq. mi.

HLWO Jurisdictional Area


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

What is regulated?


Hlwo performance standards

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


Permanent bmps to manage hydrology and water quality

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


Permanent water quality basins

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


Marble falls edwards offices

Marble Falls – Edwards Offices

Stand-alone bioretention basin

Vegetated filter strip for driveway


Marble falls rsc equipment ed pond with secondary bioretention

Marble Falls – RSC Equipment – ED pond with secondary bioretention


Questions

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 WilliamsExt. 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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