FLOOD00632

• County: Denver
• County: Jefferson
• Community: Morrison, Denver
• Stream Name: Bear Creek Lake
• Title: Flood Control Project Bear Creek Lake
• Date: 11/1/1972
• Prepared For: State of Colorado
• Prepared By: US Army Corps of Engineers
• Floodplain - Doc Type: Project

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DEPART.....,::c<T OF THE ARMY

OFFice VI'"' 7HI: CHIEF OF ENGINEERS
WI\ShINGTON. D.C. 2.0315

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l~ REPLY REFER TO

E;\CC\-I-PD 15 January 1968

SUBJECT: Bear Creek Basin, South Platte River and Tributaries,
Colorado, \~y"ming, and Nebraska

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1. I sub.nit f()r t~:",s;nission to Congress the report of the Board
of Engineers j~or l\....\.'~ ,."j l1i:,:;)ors, accompanied by the reports of the
District and Division Engineers, in partial response to a resolution
of the Conunitt:ee on Public Works of the United States Senate, adopted
14 June 1956, concernini', che advisability of constructing flood control
and related improvem",)ts 'n the South Platte River Basin, particularly
in the vicinity of and upstream from the City of Denver, Colorado.

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2. The District Engineer recommends the construction of a dam and
reservoir on Bear Creek ,il a site about 8 miles above the confluence of
Bear Cn,ek wit h the South ?latte River at Denver, Colorado, for flood
control, general recreaLon, and fish and wildlife recreation. He esti-
mates ::he fint cost of the improvement at $21,000,000, of which
$20,48L,500 would be the net Federal cost and $518,500 would be the
non-Federal share of the separable cost of the project allocated to
recreation ane. fish and hildlife enhancement. The benefit-cost ratio
is 3.1. The Divisioi1 Engineer concurs generally in the recommenda-
tions of the District Engineer but, in recognition of the possibility
that more detGLiled subsur[ac2 explorations may reveal the foundation
conditions at the site to De unsuitable for the reconunended unlined
spillway, recommends the inclusion in the cost estimate of contingency
items sufficiEnt to cover the maximum costs of spillway modification,
including acql.isition of lands to the maximum water line, and additional
foundation treatment if found necessary during advanced planning. The
estimated first cost of the project thus modified is $29,800,000, of
which $29,281,500 would be the net Federal cost. The non-Federal share
of the project costs would remain unchanged at $518,500, and the benefit-
cost ratio for the modified project is 2.2.

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3. The District and Division Engineers recommend that the Chief
of Engineers be authorized to participate in construction or reloca-
tion of transportation facilities and utilities in advance of project
construction as required to avoid increased costs for relocations; that,