HLWO Technical Manual and Construction Standard Details

The Highland Lakes Watershed Ordinance Technical Manual is a guide for property owners, developers and engineers on LCRA permit requirements and review procedures. The manual includes best management practices for meeting the water quality and channel erosion protection standards found in the Highland Lakes Watershed Ordinance.

Water Quality Management Technical Manual

• Section I – Development
  • Chapter 1 – Permitting Requirements and Procedures
  • Chapter 2 – Development Activity Meeting Water Quality Protection Performance Standards
  • Chapter 3 – Erosion and Sediment Control Best Management Practices
  • Chapter 4 – Development Activity Permanent Water Quality Treatment Best Management Practices
  • Chapter 5 – Permanent BMP Maintenance Guidelines
  • For dredge and fill activities, see the Highland Lakes Dredge and Fill Ordinance Technical Manual
• Section II – Quarry and Mine Activity
  • Chapter 1 – Permitting Requirements and Procedures
  • Chapter 2 – Meeting Water Quality Protection Performance Standards

Permanent Water Quality Feature Design Tool

• Excel worksheet to calculate water quality volume and the size of permanent water quality management features under the Highland Lakes Watershed Ordinance

Technical Manual Bulletins

• Biofiltration Water Quality Measure Biofiltration has advantages over other best management practices (BMPs). It is a stand-alone measure and has a drainage area up to 30 acres, water quality depth up to 6 feet, smaller stormwater footprint and cost, opportunity to include recreational amenities, and an enhanced appearance.
• Batch Detention Water Quality Measure
• BMP Details
• Porous Pavement
• Revegetation Options During Drought Conditions
• Cost Estimates for Erosion and Sediment Control Fiscal Surety

Construction Details

• Biofiltration media section detail pdf | CAD
• Biofiltration pond detail pdf | CAD
• Cleanout detail pdf | CAD
• Pipe outfall detail pdf | CAD
• Raised outfall detail pdf | CAD
• Rock divider detail pdf | CAD
• Scour hole detail pdf | CAD

Erosion and Sediment Control Guidance

• Erosion prevention and sediment control field guide
• Erosion and sedimentation control details
• Detalles de control de erosion y sedimentacion (Spanish version)

Notification of No Permit Required Documents

• Notification of No Permit Required form
• Notification of No Permit Required process guide
• Erosion and sediment control for individual building sites
• Preventing Stormwater Runoff Pollution
• Property Owner’s Guide to Buffer Zones
• Guía del propietario para las zonas de conservación (Spanish version)
• Excel worksheet to calculate stormwater credits for residential lots
• Disconnected runoff detail
• Gravel landscape guidance
• Conservation Landscaping Guidance

For questions, email [email protected].