FLOOD06420

• County: Costilla
• Stream Name: Rio Grande, Trinchera, Culebra, Costilla Creeks
• Basin: Rio Grande
• Title: Floodplain Information Report
• Date: 3/1/1989
• Prepared For: Costilla County
• Prepared By: CWCB
• Contract/PO #: &&
• Floodplain - Doc Type: Floodplain Report/Masterplan

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incorporated in this study. The delineations for Culebra Creek
and Rito Seco have been replaced by the new CWCB delineations
for those streams.

A Flood Hazard Boundary Map for the Town of San Luis was
prepared on December 24, 1976 by the Federal Insurance
Administration. It showed flood hazard areas in San Luis for
Rito Seco and Culebra Creek. The map has not been revised
since 1976. On September 1, 1987 that map was used as the
basis for converting San Luis from the Emergency Phase to the
Regular Phase of the National Flood Insurance Program.

A report entitled Master Drainaqe Study, Town of San Luis,
COlorado was prepared for the Town of San Luis, the Colorado
Department of Local Affairs, and the Colorado Water Conservation
Board by WRC Engineering. Inc. in December 1988. That report
included detailed floodplain delineations and water surface
profiles for Rito Seco in the Town of San Luis and vicinity.
It also included recommendations for alleviating surface and
subsurface drainage problems in the town. The information in
that report supercedes the 1976 Flood Hazard Boundary Map for
San Luis. The floodplain delineations from that 1988 report
have been incorporated in this study.

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