FLOOD07318

• County: Boulder
• County: Weld
• Community: Erie
• Stream Name: Coal Creek
• Basin: South Platte
• Title: LOMR - Affected Panel 1D, 960 D, 970D, 445 F - Case No. 04-08-0066P
• Date: 8/4/2004
• Prepared For: Erie
• Prepared By: FEMA
• Floodplain - Doc Type: Historic FEMA Regulatory Floodplain Information

Federal Emergency Management Agency
Washington, D.C. 20472
APR 0 9 2004

CERTIFIED MAIL
RETIJRN RECEIPT REQUESTED

IN REPLY REFER TO:
Case No.: 04-08-0066P

The Honorable Barbara Connor
Mayor, Town of Erie
P.O. Box 750
Erie, CO 80516

Community: Town of Erie, CO
Community No.:, 080181
Panels Affected: 0801810001 D;
080266 0960 D and 0970 D;
and 08013C0445 F
E~ectiveI~ate of AUG 04 200lt
This RevlSlon:

102-I-A-C

Dear Mayor Connor:

This responds to a request that the Department of Homeland Security's Federal Emergency Management
Agency (FEMA) revise the effective Flood Insurance Rate Map (FIRM) and Flood Insurance Study (FIS)
report for your community in accordance with Part 65 of the National Flood Insurance Program (NFIP)
regulations. In a letter dated October 25,2003, Mr. Joe Juergensen, P.E., Project Manager, Muller
Engineering Company, Inc., requested that FEMA revise the FIRM and FIS report to show the effects of
the Vista Pointe Parkway bridge and development project. The bridge project coincides with the location
of an existing railroad spur and consists of a 40-foot-wide bridge with a spanof259 feet across Coal Creek
approximately 16.300 feet upstream of Peny Street. The bridge construction involved placement of fill for
the bridge abutments and a center pier in the regulatory floodway. This request follows up on a
Conditional Letter of Map Revision issued on September 30,2002. This request also incorporated an
updated hydraulic analysis that reflected more detailed topographic data for the following two reaches of
Coal Creek:

. From approximately 200 feet downstream of the Union Pacific Railroad (UPRR) to approximately
4,400 feet downstream of the Vista Pointe Parkway bridge
. From approximately 8,200 feet downstream to approximately 5,500 feet upstream ofthe Vista
Pointe Parkway bridge

These updated topographic data were provided with a letter dated March 3, 2003, from Ms. Wendi
Palmer, P.E., Town Engineer, Town of Erie, and Mr. Juergensen.

With a Letter of Map Revision (LOMR) dated May 24, 1996 (Case No. 96-08-1 98P), the flood hazard
infonnation for Coal Creek was revised to show the effects of construction of levees and channelization
from approximately 3,600 feet downstream to approximately 600 feet upstream of the UPRR. However,
the revised floodplain and floodway boundary delineations of the flood having a I-percent chance of being
equaled or exceeded in any given year (base flood) were incorrectly shown on the annotated copy of the
FIRM panel that accompanied the May 24 LOMR, With a letter dated October 19, 1998, Ms. Pahner