FLOOD02714

• County: Weld
• Community: Greeley
• Stream Name: Cache La Poudre River
• Basin: South Platte
• Title: LOMR - Affected Panel 080184 0002 B, 080184 0002 B - Case No. 94-08-032P
• Date: 11/23/1994
• Prepared For: Greeley
• Prepared By: FEMA
• Floodplain - Doc Type: Historic FEMA Regulatory Floodplain Information

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Federal Emergency Management Agency
Washington, D.C, 204-72

CERTIFIED MAIL
RETURN RECEIPT REQUESTED

IN REPLY REFER TO.:
Case No.: 94-08~0~2P

The Honorable Willie Morton
Mayor, City of Greeley
ci ty Hall
1000 10th Street
Greeley, Colorado 80631

Community: City of Greeley,
Colorado
Community No.: 080184
Panels Affected: FIRM Panel 0002 B
and FBFM Panel 0002 B
Effective Date of
This Revision:

tlDV 23 1994

102-D-A

Dear Mayor Morton:

This is in response to a request for a revision to the effective Flood
Insurance Study (FIS) and National Flood Insurance Program (NFIP) map for
your community. Specifically, this responds to a transmittal dated
November 29, 1993, from Mr. Robert A. Ferguson, Stormwater Department
Manager, Brown and Caldwell Consultants, regarding the effective FIS report,
Flood Insurance Rate Map (FIRM), and Flood Boundary and Floodway Map (FBFM)
for the City of Greeley, Colorado. Mr. Ferguson requested that we revise the
effective FIRM and FBFM to show the effects of bridge reconstruction at
Ash Avenue and 8th Street and more detailed topographic information along the
Cache La Poudre River from just downstream of Ash Avenue to just upstream of
8th Street. A separate Letter of Map Revision (Lo.MR) has been issued to
describe the modifications to the effective FIS report, FIRM, and FBFM for
the unincorporated areas of Weld County.

All data required to complete our review of this request were submitted by
Mr. Ferguson with transmittals dated November 29, 1993, and February 10,
March 25, April 12, June 27, July 11, August 11, and September 12, 1994, and
with a letter dated January 20. 1994. Because this request is for public
benefit, fees were not assessed for the review.

We have completed our review of the submitted data and the flood data shown
on the effective FIRM and FBFM, and have revised the FIRM and FBFM to modify
the elevations, floodplain and floodway boundary delineations, and zone
designations of a flood having a I-percent probability of being equaled or
exceeded in any given year (base flood) along the Cache La Poudre River from
the corporate limits (approximately 1,050 feet downstream of U.S. Highway 85)
upstream to 5th Street.

Our review of the available topographic and hydraulic data indicates that
approximately 35 percent of the base (lOO-year) flood discharge along the
Cache La Poudre River overtops the combined 8th Street and U.S. Highway 85
embankments in the vicinity of the City of Greeley Water Pollution Control
Facility and flows along the low-lying area north of 8th Street. This area
is designated as Zone A7 on the effective FIRM for your community. The
overflow returns to the main channel of the Cache La Poudre River, again by