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

BEYOND ENGINEERING

City of Brush
Storm Drainage Master Plan

Alternative 2 (also shown as Alternative 2 in the previous Carter Burgess study) consists
of construction of street grading and other improvements from Alternative 1, but instead
to flowing to a proposed retention pond, the runoff is conveyed via large diameter storm
sewer to the city's existing main retention pond north of 1-76. Total costs for this
alternative are approximately $3.4 million and $3.6 million for the 10-year and 25-year
design options respectively. A 100-year option was not evaluated for this alternative
since it discharges to the city's main detention facility, which is assumed to be adequate
for large storm events. This assumption should be verified during final design.

Alternative 3 consists of similar street and storm sewer improvements but utilizes
detention storage near the existing Central School and Middle School sites. Total
estimated costs for this alternative are approximately $1.3 million and $1.5 million for
the 10-year and 25-year design options respectively. These costs are based on surface
detention. Both detention sites are comparatively small which could require underground
detention to some extent, which would greatly increase construction cost and create
maintenance concerns.

Alternative 4 is similar to Alternative 3 but conveys stormwater runoff to a single
detention facility at the Middle School site. Total estimated costs for this alternative are
approximately $1.5 million and $1.7 million for the 10-year and 25-year design options
respectively. These costs are also based on surface detention and if underground
detention is utilized, construction costs would increase significantly.

Sunset Addition
The Sunset Addition includes areas along Emerson Street in the western portion of the
City of Brush and in the vicinity of Sunset Park. Three alternatives were considered for
the Sunset Addition area. Alternative 1 consists of a combination of Altematives 4 and 5
of the previous Carter Burgess study. Altemative 1 consists on construction of additional
inlets and storm sewer in Emerson Street and a larger storm sewer outfall in Cambridge
Street that discharges to an existing retention facility near Pettey's Gardens north of Mill

Nolte Associates,Inc.

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