FLOOD10505

• County: Morgan
• Community: Brush
• Basin: South Platte
• Title: Brush - Storm Drainage Master Plan
• Date: 7/19/2006
• Prepared For: Brush
• Prepared By: Nolte Associates, Inc.
• Floodplain - Doc Type: Floodplain Report/Masterplan

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I'JOlTE

City of Brush
Storm Drainage Master Plan

BEYOND ENGINEERING

Purpose and Scope
The project intent is to update the "City of Brush Stormwater System Study" that was
previously prepared by Carter Burgess in February 2002 (Ref. 1). The update includes
consideration of additional alternatives in the study areas and also includes alternatives
for the area south of the railroad tracks and in the vicinity of Mill Street and Lincoln
Street that were not included in the original study. The current study is intended to focus
on identified problem areas on a large scale and is not intended to address smaller, local
drainage problems that may be present in the city or to address storm sewers that may be
necessary for smalllocal areas.

A large portion of the City of Brush lies within the floodplain of Beaver Creek as
identified in a previous floodplain study prepared by Gingery Associates for the City of
Brush and the Colorado Water Conservation Board in 1976 (Reference 2). In 1991, the
US Army Corps of Engineers prepared a study (Reference 3) for proposed levees along
Beaver Creek to reduce flood damages and remove the majority ofthe City of Brush
from the 100-year floodplain. A separate Beaver Creek Conceptual Flood Control Plan
study is being prepared by Nolte Associates to consider the Corps of Engineers proposed
levee system and to evaluate other options for Beaver Creek. The alternatives considered
in this study are intended for managing local drainage within the city and will not
significantly affect the status of the Beaver Creek Floodplain or reduce damages due to
flooding from Beaver Creek.

HYDROLOGIC ANALYSIS

Methodology
The hydrologic analysis was conducted by utilizing the US Army Corps of Engineers
HEC-l Computer Program (Reference 4) to determine peak discharges and runoff
volumes for the 10-year and 25-year storms for developed conditions within the drainage
basins. All hydro graphs were computed based on the Natural Resources Conservation

Nolte Associates,Inc.

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