FLOOD05088

• County: Adams
• Community: Arvada
• Stream Name: Hidden Lake, Bates Lake
• Basin: South Platte
• Title: Major Drainageway Planning
• Date: 11/1/1975
• Prepared For: Urban Drainage and Flood Control District, Arvada and Adams County
• Prepared By: Hydro-Triad, LTD.
• Floodplain - Doc Type: Floodplain Report/Masterplan

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CHAPTER I
INTRODUCTION

A. Authorization
This study, covering the storm drainage considerations and major
drainageway planning for the Hidden Lake and Bates Lake basins, was
authorized under the terms of the contract between the Urban Drainage
and Flood Control District (U.D. & F.C.D.) and Hydro-Triad, Ltd., dated
November 22, 1974. The notice to proceed was received on November 25,
1974. The participating or sponsoring governmental agencies, in
addition to the U.D. & F.C.D., for this major drainageway planning
report are Adams County and the City of Arvada. The mapping of the
basin was accomplished under a separate contract between the U.D. &
F.C.D. and the Bell Mapping Company.
B. Purpose and Scope
The study was performed in two parts, Phase A and Phase B. The
purpose of the Phase A portion of the study can be summarized as follows:
Perform an in-depth evaluation of the hydrological and hydraulic
factors of the storm drainage for the Hidden and Bates Lake basins, with
primary focus on the major drainageways and floodplains, such that the
current problems can be identified and that a series of drainage improve-
ment alternatives can be developed and compared. The comparison or
rating criteria is based, in part, on cost-benefit aspects, plus
legal and environmental impact considerations. A recommended plan
for the major drainageways to accommodate the storm runoff up to