Drainage Management
Storm Water Maintenance Summary
The Department of Public Works is responsible for maintaining our City’s storm water drainage system and engineering improvement projects to help reduce flooding during rain events. These efforts include maintaining drainage infrastructure such as: maintaining natural and concrete-lined channels, channel concrete repair, street sweeping and sidewalk cleaning in the Downtown area, and Right of Way and median vegetation maintenance. 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. If there is a resource that would be helpful to you and it is not available, please let us know by contacting us at pwinfo@sanantonio.gov.
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Flood Maps Digital Flood Insurance Rate Maps (DFIRM) approved by the Federal Emergency Management Agency (FEMA) |
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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 |
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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 |
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Elevation Certificate FEMA, National Flood Insurance Program - Elevation Certificate and instructions |
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Drainage Terms A glossary of key drainage terms |
Storm Water Maintenance Snapshot
We maintain:
- 3340 acres of Earthen Drainage Channels or 400 miles of Earthen Drainage Channels
- 140 miles of Concrete Drainage Channels
- 1,189 acres of Street Rights of Way
- 719 individual Medians totaling 167 acres
- 317 individual Flood Buyout Properties totaling 111 acres
- 192 miles of Natural Waterways (104 miles maintained by internal crews and 88 miles maintained by contract services)
- 581 miles of Underground Storm Sewers
We sweep and clean:
- 1,866 gutter miles Arterial/Collector Streets
- 5,796 gutter miles Residential Streets
- 61 gutter miles of Streets in Central Business District (CBD)
- 13 miles of Sidewalks in the Central Business District (CBD)
- 8,000 Storm Sewer Inlets
