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Harris County Watersheds > Clear Creek

Specific information about the changes in the Clear Creek 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.


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)
26.2 sq. mi. 50.0 sq. mi. 19.7 sq. mi. 30.2 sq. mi.
TSARP Studied Stream Miles = 73.7 miles Current Studied Stream Miles = 66.7 miles

Drainage area 80 sq. mi.
TSARP 1% Rainfall 24hr duration 13.5 in
Total channel miles 153 mi
Allison: Total flooded area 17.9 sq. mi.
Allison: Flooded homes 3,000
Population 118,026

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