Drainage and Flood Information


  • Physical Address
  • Municipal Plaza Building
    114 W. Commerce, 6th Floor
    San Antonio, TX 78205   
  • Mailing Address
  • P.O. Box 839966
    San Antonio, TX 78283-3966
  • Phone
  • 210.207.8022


  • Mike Frisbie, P.E.
    Director and City Engineer
  • Anthony Chukwudolue, P.E.
    Assistant Director
  • Razi Hosseini, P.E.
    Assistant Director
  • Christie Chapman
    Interim Assistant Director
  • Arthur Reinhardt, P.E., C.F.M.
    Assistant Director

Transportation & Capital Improvements is responsible for maintaining our City’s storm water infrastructure and engineering improvement projects to help reduce flooding during rain events. We also review residential and commercial storm water development plans to ensure future construction projects and private development do not adversely impact current drainage systems. Lastly, we are also responsible for overseeing the federal and state Municipal Separate Storm Sewer System (MS4) permit.

Budget and Storm Water Programs
Storm Water Utility Fee

San Antonio River Authority (SARA)
Digital Data and Modeling Repository

Flood Maps
Digital Flood Insurance Rate Maps (DFIRM) approved by the Federal Emergency Management Agency (FEMA)

311 City Connect
To submit a storm water related service request, please call 311 or make a report on line through City Connect – Online Services

National Flood Insurance Program (NFIP)
Federally regulated insurance program which allows the City to enforce floodplain management standards and allows property owners and renters to purchase flood insurance

Certificate button

Elevation Certificate
FEMA, National Flood Insurance Program - Elevation Certificate and instructions

UDC Definitions

Unified Development Code (UDC) Definitions
Appendix A of the UDC lists definitions and rules of interpretation

Bexar Regional Watershed Management (BRWM)

GIS Maps

The following GIS maps are also available.

Transportation & Capital Improvements

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Transportation & Capital Improvements

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