FLOOD06564

• County: Boulder
• Community: Boulder
• Stream Name: Goose, Wonderland, Elmer's Twomile, 2-mile, 4-mile
• Basin: South Platte
• Title: Major Drainageway Planning Volume 1, Part B
• Date: 4/1/1969
• Prepared For: Boulder County
• Prepared By: CWCB
• Floodplain - Doc Type: Floodplain Report/Masterplan

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SECTION I

liHRODUCTION

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This report is a storm drainage pilot planning study undertaken for
the Denver Regional Council of Governments to provide the methodology
for the preparation of an areawide storm drainage plan and program
in the second phase of the regional storm drainage study.

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The North Boulder, Colorado, area was chosen for the pilot study be-
cause it represents most of the urban drainage problems found in the
Uenver Region. It has deteriorated waterways, it has flood plain en-
croachment, and it has roadways with inadequately sized culverts.

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The City of Boulder h~s had no flood plain management program or policy,
nor any flood plain regulation ordinance. It has been on a collision
course with a major catastrophe for over a half century. The pressures
of grol"th during the last ten years have accelerated the creation of
new and more costly urban drainage problems. There have been instances
of major hotel and apartment complexes built in the channel bottoms.
These mistakes must nOl" be paid for.

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SCOPE OF WORK

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The assianment, in addition to providing methodology for Region wide
planning, was to investigate alternative storm drainage plans for the
drainage basins by taking into consideration economics, comprehensive
plans and programs of the City of Boulder and County of Boulder, open
space needs of the community, greenbelt requirements, and legal aspects
of urban storm drainaae, all with full consideration given to environ-
mental design concepts in the development of each of the alternatives.

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The assignment also included the preparation of comprehensive storm
drainage plans for each of the waterways. The purpose of the compre-
hensive plans is to provide sufficient information to permit local and
state agencies to plan bridges and culverts for new roadv/ays, acquire
necessary rights-of-way, and plan for future channel and flood plain
1 imi ts.

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The assignment was also to investigate methods and sources of financ-
ing the proposed project and in general to develop a financing strategy
which could be appl ied to other areas in the Denver Region under simi-
lar conditions.

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The intent of the pilot study was also to test, on a practical basis,
the Urban Storm Drainaae Design Criteria Manual, which was completed
for the Denver Regional Counci I of Governments in March of 1969.

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Spec i fica 11 y, the
drainage system.
work.

pilot study was limited to consideration of the major
The initial drainage system was not included in the

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