FLOOD09330

• County: La Plata
• Community: La Plata County and Unincorporated Areas
• Basin: San Juan/Dolores
• Title: FIS - La Plata County and Unincorporated Areas
• Date: 5/21/2001
• Prepared For: La Plata County
• Prepared By: FEMA
• Floodplain - Doc Type: Current FEMA Regulatory Floodplain Information

5.4 Flood Insurance Rate Map Description

The Flood Insurance Rate Map for the llllincorporated areas of La
Plata County, Colorado is, for insurance purposes, the principal
result of the Flood Insurance Study~ This map (published separately)
contains the official delineation of flood insurance zones and base
flood elevation lines. Base flood elevation lines show the locations
of the expected whole-foot water-surface elevations of the base
(lOa-year) flood. This map is developed in accordance with the
latest flood insurance map preparation guidelines published by the
Federal Insurance Administration.

6.0 OTHER STUDIES

The U.S. Army Corps of Engineers completed flood hazard studies for the
Animas River, Junction Crcck~ and Dry Gulch Creek in the Durango area i~
May 1977 (Reference 2). The studies included 10-, 50-, 100-, and 500-
year flood profiles and flood plain delineations for 9 miles of the
Animas River, 4 miles of Junction Creek, and 0.8 mile of Dry Gulch Creek.
Results of the u.s. Army Corps of Engineers' studies were reviewed and
adopted in this Flood Insurance Study, except for the portion of Junction
Creek outside the Durango corporate limits, where the hydraulics were
reanalyzed based on more recent topographic mapping.

The U.S. Army Corps of Engineers also conducted a Flood Hazard Informa-
tion report of Vallecito and Grimes Creeks (Reference 3). The study
included 10-, 50-, 100-, and SOD-year flood profiles and flood plain
delineations. The results of that study were reviewed and adopted i~
this study.

Another study conducted by U.S.
on portions of Animas River and
of that study were reviewed and

Army Co~ps of Engineers was
Hermosa Creek (Reference 6).
adopted in this study.

done in 1977
The results

The Flood Hazard Boundary Map prepared by the Federal Insurance Administra-
tion for La Plata County (Reference 15) is superseded by this study.

This study is authoritative for the purposes of the National Flood Insur-
ance Program; data presentea herein either supersede or are compatible
with all previous determinations.

7.0 LOCATION OF DATA

Information concerning the pertinent data used in the preparation of
this study can be obtained by contacting the Federal Emergency
Management Agency~ Xitigation Division, Jenver Federal Center, Build~~g
710, Box 25267, Denver, Colorado 80225-0267.

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