FLOOD00987

• Designation Number: 186
• County: Boulder
• Community: Longmont
• Stream Name: Lefthand Creek
• Title: Floodplain Information Report - Lefthand Creek, Volume I: Mouth to Foothills Highway, Boulder County and Longmont
• Date: 12/1/1981
• Designation Date: 4/1/1982
• Floodplain - Doc Type: Floodplain Report/Masterplan

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PREFACE

INTRODUCTION

This floodplain information report presents the results of a study on

the Lefthand Creek Floodplain in the vicinity of Longmont, Colorado. It

was prepared from hydrologic and hydrau1 ic information provided by the

U.S. Army Corps of Engineers, Omaha District. The report document was

prepared by Gingery Associates, Inc., Englewood, Colorado at the request

of the City of Longmont and Boulder County in cooperation with the

Colorado Water Conservation Board.

Authorization

This report was authorized by the Colorado Water Conservation Board

in joint sponsorship with Longmont, Colorado and Boulder County.

The Board's power and duty is .

"

to devise and formulate methods, means and plans for bringing
about the greater util ization 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; incorporated towns; and
counties of this state, , ."

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

City of Longmont
Department of Engineering
Civic Center Complex
3rd & Kimbark Streets
Longmont, Colorado 80501
776-6050

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

1973.

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

"

to estab 1 ish, regu1 ate, restri ct, and 1 imit such uses on or
along any storm or floodwater runoff channel or basin, as
such storm or floodwater runoff channel or basin has been
desi gnated and approved by the Co 10rado Water Conservat ion
Board, in order to lessen or avoid the hazards to persons and
damage to property resu 1t i ng from the accumu1 at ion of storm
or floodwaters. . ,"

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

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

as stated in Section 30-28-111 for county governments and Section
31-23-201 for municipal 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.

Technical back-up data is available for review from the offices
listed above. The technical back-up includes all pertinent data and cal-
culations used in the floodplain analysis.

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