FLOOD10386 ‎(2)‎

• Designation Number: 576
• County: Gilpin
• Community: Black Hawk
• Stream Name: North Clear Creek, Gregory Gulch and Chase Gulch
• Title: Floodplain Information Report - Black Hawk
• Date: 7/1/2004
• Prepared For: Black Hawk and CWCB
• Prepared By: Love and Associates
• Floodplain - Doc Type: Floodplain Report/Masterplan

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INTRODUCTION

Purpose and Scope

The Floodplain Information Report provides supporting documentation for modified
floodplains within the City of Black Hawk. For CWCB designation purposes, the flood-
prone areas contained herein replace those floodplains shown in the City of Black Hawk
FIRM, dated April 1984.. The 1984 FIRM does not reflect the status of current
development within the City. This document provides engineering information to fulfill
the requirements of CWCB designation.

The document includes:

1. Authorization for the report and its purpose and scope;

2. Study area description including information on the community, the watershed, any
known flooding history/flooding problems, previous studies and projects, and
community response to the CWCB designation and approval process;

3. Description of hydrologic and hydraulic information; and

4. Floodplain management program information.

Authorization

The CWCB has statutory responsibilities related to the designation and approval of
floodwater runoff channels or basins as follows:

. .. "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 Counties, to County planning commissions, and to boards of
adjustment of cities, incorporated Counties, and counties of this state"... Section
37-60-106(1)(c) of the Colorado Revised Statutes (CRS).

A CWCB designation and approval of current floodplain information is needed for the
City of Black Hawk, Colorado. CWCB has prepared the Floodplain Information Report
to update the identification of the City's flood-prone areas so the community can better
implement its floodplain management program.

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