FLOOD04922

• County: Larimer
• Community: Fort Collins
• Stream Name: Spring Creek
• Basin: South Platte
• Title: LOMR - Affected Panel 080102 0011 C, 0012 C - Case No. 00-08-365P
• Date: 8/23/2001
• Prepared For: Fort Collins
• Prepared By: FEMA
• Floodplain - Doc Type: Historic FEMA Regulatory Floodplain Information

'.

Federal Emergency Management Agency
Washington, D.C. 20472

APR 26 2001

CERTIFIED MAIL
RETURN RECEIPT REQUESTED

IN REPLY REFER TO:
Case No,: 00-08-365P

The Honorable Ray Martinez
Mayor, City ofFort Collins
P.O. Box 580
Fort Collins, CO 80522-0580

Community: City of Fort Collins, CO
Community No.: 080102
Panels Affected: 0011 C and 0012 C
Ef~ectivepate of AUG 23 2001
ThIs ReVISIOn:

102,I-A-C

Dear Mayor Martinez:

This responds to a request that the Federal Emergency Management Agency (FEMA) revise the effective
Flood Insurance Rate Map (FIRM) and Flood Insurance Study (FIS) repoq for your community in
accordance with Part 65 of the National Flood Insurance Program (NFIP) regulations. In a letter dated
July 28, 2000, Mr. Gregory J. Koch, P.E" Project Manager, Anderson Consulting Engineers, Inc"
requested that FEMA revise the FIRM and FIS report to show the effects of three bridge replacement
projects within three separate reaches along Spring Creek: from approximately 550 feet downstream to
approximately 1,350 feet upstream of Welch Street; from approximately 1,400 feet downstream to
approximately 950 feet upstream of Remington Street; and from approximately 1,300 feet downstream to
approximately 1,050 feet upstream of West Drake Road, The bridge replacement project at Welch Street
included construction of a single-span bridge with a 30-foot-wide by 6.9-foot-high opening under the
crossing of Spring Creek. The bridge replacement project at Remington Street included construction of a
single-span bridge with a 30-foot-wide by 7.2-foot-high opening under the crossing of Spring Creek.
The bridge replacement project at West Drake Road included construction of a dual-span bridge with a
5.0-foot-wide by 9,2-foot-high opening under the crossing of Spring Creek, addition of a pedestrian
bridge with three 5- foot by 7- foot reinforced,concrete box <,;.ulverts under the' crossing of Spring Creek
approximately 780 feet downstream of West Drake Road, channel regrading from approximately
600 feet downstream to approximately 900 feet upstream of West Drake Road, and improvements to
New Mercer Ditch approximately 950 feet downstream of West Drake Road.

All data required to complete our review of this request were submitted with letters from Ms. Marsha
Hilmes-Robinson, Floodplain Administrator, City of Fort Collins, and Mr. Koch,

We have completed our review of the submitted data and the flood data shown on the effective FIRM
and in the effective FIS report, We have revised the FIRM and FIS report to modify the elevations and
floodplain and floodway boundary delineations of the flood having a I-percent chance of being equaled
or exceeded in any given year (base flood) along Spring Creek. As a result of the modifications, the
Base Flood Elevations (BFEs) for Spring Creek and the widths of the Special Flood Hazard Area
(SFHA), the area that would be inundated by the base flood, and the regulatory floodway increased in
some areas and decreased in other areas, Because the increases in BFE are not large enough to change
the whole-foot BFEs shown on the effective FIRM, the increases will not be published in a local
newspaper. The modifications are shown on the enclosed annotated copies of FIRM Panels 0011 C and
0012 C; Profile Panels 17P, 18P, 20P, 21P, 25P, and 26P; and affected portions of the Floodway Data