FLOOD02650

• County: La Plata
• Stream Name: Animas River
• Basin: San Juan/Dolores
• Title: Hydrology Addendum to FIS La Plata County Unincorporated Areas
• Date: 5/21/2002
• Prepared For: La Plata County
• Prepared By: Montgomery Watson
• Floodplain - Doc Type: Floodplain Report/Masterplan

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. INTRODUCTION
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. Purpose and Scope
. This Hydrology Addendum (HA) was prepared to assure that the May 21,2001 revised PIS for La
. Plata County, Colorado, Unincorporated Areas, meets the basic technical requirements for
. designation and 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 relating 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
i . 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(l)(c) of the Colorado Revised Statues (CRS).
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I . CWCB designation and approval is needed for the La Plata County, Colorado, Unincorporated
. Areas, May 21, 2001 revised PIS. The CWCB has prepared this HA as a means of designating
. La Plata County's PIS so that the community can better implement its floodplain management
I · program.
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