FLOOD08649

• County: Ouray
• Community: Ridgway
• Stream Name: Uncompahgre River & Cottonwood Creek
• Basin: Gunnison
• Title: Hydrology Addendum to FIS Town of Ridgway
• Date: 9/27/1985
• Prepared For: Ouray County
• Prepared By: Montgomery Watson
• Floodplain - Doc Type: Floodplain Report/Masterplan

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. INTRODUCTION

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. PurDose and ScoDe
. This Hydrology Addendum (HA) was prepared to assure that the September 27, 1985 revised PIS
, . for the Town of Ridgway, Colorado meets the basic technical requirements for designation and
I . approval by the CWCB. Colorado statutes require that local governments obtain from the CWCB
. the designation and approval of floodplain information for its use in regulatory purposes. This HA
. provides a means for the PIS to meet that statutory objective.

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. This HA includes:

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

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

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. 3. Description of hydrologic and hydraulic information; and

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. 4. Floodplain management information.

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

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. ... "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 ofthis state"... Section 37-60-106(1)(c) of the Colorado Revised Statues (CRS).

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. CWCB designation and approval is needed for the Town of Ridgway, Colorado, September 27,
. 1985 PIS, The CWCB has prepared this HA as a means of designating Ridgway's PIS so that the
. community can better implement its floodplain management program.

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