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Harris County Watersheds > Buffalo Bayou

Specific information about the changes in the Buffalo Bayou watershed will be available soon. For information about general changes between the current FEMA floodplain maps and the FEMA Preliminary Flood Insurance Rate Maps, please go to the Watershed main page.

One of the additional streams along Buffalo Bayou, W140-06-00, has not been released as part of the Preliminary FEMA FIRMs. For more information click here.
FEMA Preliminary Flood Insurance rate Maps Current FEMA Flood Insurance Rate Maps
1% (100-Yr) 0.2% (500-Yr) 1% (100-Yr) 0.2% (500-Yr)
5.5 sq. mi. 11.3 sq. mi. 7.0 sq. mi. 9.9 sq. mi.
TSARP Studied Stream Miles = 65.0 miles Current Studied Stream Miles = 54.4 miles
Drainage area 92 sq. mi.
TSARP 1% Rainfall 24hr duration 13.2 in
Total channel miles 107 mi
Allison: Total flooded area 10.2 sq. mi.
Allison: Flooded homes 2,500
Population 410,658

Data for areas inside of Harris County only.
  © 2008 FEMA and Harris County Flood Control District. All rights reserved. Terms & Conditions