FLOOD01135

• Designation Number: 223
• County: Boulder
• Community: Unincorporated Boulder County
• Stream Name: Upper Lefthand Creek
• Title: Floodplain Information Report - Upper Lefthand Creek, Volume II, Boulder County, Colorado
• Date: 8/1/1983
• Designation Date: 11/1/1983
• Floodplain - Doc Type: Floodplain Report/Masterplan

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PREFACE

INTRODUCTION

This floodplain information report presents the results of a study
on Upper Lefthand Creek, James Creek, and Little James Creek. It was
prepared from hydrologic and hydraulic information provided by the U.S.
Army Corps of Engineers, Omaha District. The report document was
prepared by Simons, Li & Associates, Inc., Denver, Colorado at the
request of Boulder County in cooperation with the Colorado Water

Authorization

This report was authorized by the Colorado Water Conservation Board
in joint sponsorship with Boulder County.
The Board's power and duty is . . .

"

to devise and formulate methods, means and plans for bringing
about the greater utilization of the waters of the State and
the prevention of flood damages therefrom and to designate
and approve storm or floodwater runoff channels or basins,
and to make such designations available to legislative bodies
of cities and incorporated towns; to county planning
commissions; and to boards of adjustment of cities; incor-
porate towns; and counti es of thi s state . . ."

Conservation Board.

Copies of this report are available for public distribution, for a
nominal fee, at the following listed offices:

as stated in Section 37-60-106 (l)(c) of the Colorado Revised Statutes

Boul der County
Department of Public Works
P.O. Box 471
2045 13th Street
Boulder, Colorado 80306
441-3900

1973.

The cities, incorporated towns, and counties within the study area
may provide zoning regulations. . .

Colorado Water Conservation Board
823 Centennial Building
1313 Sherman Street
Denver, Colorado 80203
866-3441

"

to establish, regulate, restrict, and limit such uses on or
along any storm or floodwater runoff channel or basin, as
such storm or floodwater runoff channel or basin has been
designated and approved by the Colorado Water Conservation
Board, in order to lessen or avoid the hazards to persons and
damage to property resulting from the accumulation of storm
or floodwaters. . ."

Technical back-up data is available for review from the offices
listed above; however, it has not been published in sufficient quantities
for public distribution. The technical back-up includes all pertinent
data and calculations used in the floodplain analysis.

as stated in Section 30-28-111 for county governments of the Colorado
Revised Statutes 1973.

Therefore, upon official approval of this report by the Colorado
Water Conservation Board, the areas described as being inundated by the
100-year flood (see Glossary - Intermediate Regional Flood) can be
designated as flood hazard areas and their use regulated accordingly by
the local agencies.

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