FLOOD10390

• County: Boulder
• Community: Boulder
• Stream Name: Fourmile Canyon
• Basin: South Platte
• Title: Fourmile Canyon Creek - Major Drainageway Planning - Phase A Report - Alternatives Analysis
• Date: 6/1/2000
• Prepared For: UDFCD, Boulder
• Prepared By: Love & Associates
• Floodplain - Doc Type: Flood Mitigation/Flood Warning/Watershed Restoration

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INTRODUCTION

This report is part of a study authorized by the Urban Drainage and Flood Control District
(UD&FCD) in the agreement regarding Major Drainageway Planning for Fourmile Canyon
Creek, dated June 2, 1999 (Agreement No. 98-11.09). The study area, shown in Figure 1-1,
consists of the Fourmile Canyon Creek watershed tributary to Boulder Creek, which encompasses
portions of the City of Boulder and parts of Boulder County.

1

AUTHORIZA TION

1.1

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The study is divided into two phases. The first phase (phase A) of which this report is a part
covers the hydrologic, hydraulic, and alternate evaluation aspects of the project. The second
phase (Phase B) covers the preliminary design of the selected alternate.

drainage conditions for the
designs of

and future
and prepare preliminary

PURPOSE AND SCOPE

The purpose of the study is to analyze the existing
watershed, develop alternate drainageway planning concepts,
facilities based on a master plan.

1.2

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studies,

analyzing the existing and future drainage conditions included

present

information,

Meeting periodically with the Project Sponsors to obtain
findings, and discuss results of the planning tasks.

Tasks undertaken for

1

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the

m

interest

knowledge or specific

Contacting agencies and/or individuals that have
study area and obtaining their input.

2

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basin

Conducting hydraulic analyses along the major drainageway to ascertain capacities of
existing structures, determine location of flooding problems, and analyze hydraulic
impacts of future peak discharges

future development

and

the existing

for

of hydrologic analyses

Preparation
conditions.

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4

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future drainage

address

that

alternates

improvement

of drainageway

Development
impacts

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flooding,

Evaluation of alternates based on criteria, estimated construction costs, potential
planning constraints and/or issues.

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...

)

Figure 1-1
Study Area

Preparation of a written alternates evaluation report including a recommended alternate for
each reach of the drainageway.

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1-1

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