Low Impact Development (LID) is a group of techniques to mitigate the impact of urbanization on the hydrologic cycle. It addresses the increased quantity and decreased quality of runoff that result from increases in impervious surfaces such as concrete and asphalt. Best Management Practices (BMPs) are specific LID controls that are engineered to slow down the runoff, spread out the runoff, and soak it in. Click for more information from the EPA’s web site.
For Design Professionals
LID Technical Guidance Manual
The San Antonio River Authority in partnership with the Bexar Regional Watershed Management (BRWM) has developed a manual that outlines standard practice for design and implementation of Best Management Practices (BMPs) for Low Impact Development (LID). The following files are components of the manual which provide technical guidance on LID BMP design for policy makers, designers and regulators.
Full LID Manual
Ch 1 and 2: Introduction to LID and Regional Considerations
Ch 3: LID Selection: Structural BMPs
Ch 4: Execution Considerations
Ch 5: LID Review Process
Appendix A: BMP Sizing
Appendix B: BMP Design Guidance
Appendix C: BMP Design Templates
Appendix D: BMP Fact Sheets
Appendix E: Plant List
Appendix F: Inspection and Maintenance
Appendix G: Cost Estimates and Regulatory Guidance
TAC Edward’s Aquifer
The Edward’s Aquifer recharge zone is a special case with specific design standards implemented by the Texas Commission on Environmental Quality (TCEQ). These rules do not preclude the implementation of LID BMPs but rather establish specific guidelines in their design. Click for more information from TCEQ’s web site.
Why talk to SARA?
SARA is providing LID review services to its community partners in order to promote appropriate management of the hydrology, water quality, and stream function of the San Antonio River Basin. For additional information, please contact Karen Bishop at (210) 227-1373 or click here.
Additional Resources for Professionals
An introductory series to the technical process of installing low impact development (also known as green stormwater infrastructure) features. These videos are meant to be overviews, and not instructional. Please visit sara-tx.org to learn more about the San Antonio River Authority’s low impact development initiatives across the San Antonio River Basin.
Proposition 1, the Edwards Aquifer Protection Venue Project, authorizes the City of San Antonio to continue the watershed and preservation project initiated in 2000 and continued in 2005 and 2010. Through the 2015 extension of this project, a 1/8 cent sales tax collects $100 million and creates a new focus area. Of this amount, $90 million is funded for protection of property located over the Edwards Aquifer through the purchase of conservation easements and fee simple acquisition; the remaining $10 million is dedicated for Edwards Aquifer protection projects within urbanized areas of Bexar County’s recharge and contributing zones that will improve Edwards Aquifer water quality.
Innovative design with a purpose! A concise guide to leveraging low impact development in San Antonio through incentives and benefits.
A guide to seventeen of the most common stormwater best management practices, also known as “BMPs,” from the Bexar Regional Watershed Management partners and the San Antonio River Authority.
The San Antonio River Authority (SARA) and Bexar County regularly host a training program for the construction inspection and maintenance of low impact development (LID) permanent stormwater best management practices (BMPs). The need for such a training program arose from separate LID-oriented community efforts through Bexar County and the City of San Antonio. Stakeholder processes associated with these two important efforts identified the need for a training program for designers, installers and those who annually inspect and maintain LID practices in the community.
This program rebates construction of on-site stormwater best management practices (BMPs) to either new construction or a retrofit of existing property. The rebate program is available in Bexar, Wilson, Karnes, and Goliad counties. BMPs must be designed using SARA’s San Antonio River Basin Low Impact Development Technical Guidance Manual (SARB LID Technical Manual).