Region 12 San Antonio Flood Planning Region

Region 12The Medina river originates in Northwestern Bandera county on the Edwards Plateau where it flows southeast to merge with the San Antonio River, flowing from its spring-fed headwaters in Bexar County, just southeast of the City of San Antonio. From there, the San Antonio River flows across the South Texas Plains largely unimpeded where it empties into the Guadalupe River just northwest of San Antonio Bay. Other streams within the basin include the Leon, Salado, Calaveras, and Cibolo creeks. This region crosses five ecoregions and is home to three major lakes and reservoirs.

For a detailed map of Region 12, please visit the Texas Natural Resources Information System (TNRIS) Flood Planning Regions Map Collection.



Go to Region 12 San Antonio RFPG External Host Website



Population Estimate (2019): 2,225,430

Approximate Area: 4,422 square miles

Approximate Stream Miles: 4,206

Approximate NFIP Claims (1975-2019): $48,925,054

Counties Represented:

*indicates this county is partially within this RFPG and is also represented by at least one other RFPG

Major Cities (Population greater than 25,000):

*indicates this city is partially within this RFPG and is also represented by at least one other RFPG

Major Lakes & Reservoirs:

Ecoregions of Texas Represented:

Regional Flood Planning Group Meeting Minutes & Updates

Please see the RFPG Meeting Schedule webpage for information on the past and upcoming meetings.

Contacts

Planning Group Sponsor Contact: San Antonio River Authority, Caitlin Heller, (210) 302-3293

Planning Group Chair: Nefi Garza, (210) 788-7516

TWDB Contact: Anita Machiavello, (512) 463-5158

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