FLOOD02508

• Designation Number: 292
• County: Adams
• Community: Westminster
• Stream Name: Big Dry Creek
• Basin: South Platte
• Title: Flood Hazard Area Delineation - Bruchez Farms Property, Big Dry Creek at Wadsworth Parkway
• Date: 1/1/1988
• Designation Date: 3/1/1988
• Floodplain - Doc Type: Floodplain Report/Masterplan

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Wright Water Engineers, Inc.

DENVER OFFICE
2490 West 26th Ave., Suite 55 A
Denver, Colorado 80211
[phone]

TULSA OFFICE
201 West 5th St., Suite 130
Tulsa, Oklahoma 74103
[phone]

January 18, 1988

GLENWOOD SPRINGS OFFICE
818 Colorado Avenue
P.O. Box 219
Glenwood Springs, Colorado 81602
[phone]
Denver Direct Line: 893-1608

Mr. Andrew Loewi
Brownstein Hyatt Farber ~ Madden
Twenty-Second Floor
410 Seventeenth Street
Denver, Colorado 80202

Re: Bruchez Farms Property Adjacent to Big Dry Creek

Dear Mr. Loewi:

We are pleased to present this revised report detailing our investigations concern-
ing the definition of the floodplain in the vicinity of the Bruchez Farms property on
BIg Dry Creek just downstream of Standley Lake. Our original report was completed
on September 10, 1987 and was subsequently reviewed by the Urban Drainage and
Flood Control District and the city of WestmInster.

The 1986 FHAD report by Greiner Engineering placed almost all of the Bruchez Farms
property within the floodplain of Big Dry CreeL Our report represents a more
detailed, in-depth study of this reach of Big Dry Creek. Changes were made to the
existing HEC-l computer models by Incorporating an Improved Inlet with the existing
Colorado & Southern Railroad culvert, by utlllzing the existing storage upstream of
the railroad, and by incorporating the changes requested by the reviewing agencies.

The results of our Investigations indicate that the depth of water Just upstream of
the railroad during the 100-year flood event is several feet lower than that shown in
the 1986 study. This lower water surface removes most of the Bruchez property
from the floodplain of Big Dry Creek.

Very truly yours,

WRIGHT WATER ENGINEERS. INC.

By ~/~~

Ronald L. Rossmiller, Ph.D., P.L
Senior Project Engineer

cc: Mr. Harold Bruchez