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Last modified
8/16/2009 3:17:51 PM
Creation date
6/26/2007 11:16:19 AM
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Board Meetings
Board Meeting Date
7/20/2004
Description
Flood Section - Outline for the Revision of the CWCB "Rules & Regulations for the Designations & Approval of Floodplains & of Storm or Floodwater Runoff Channels in Colorado"
Board Meetings - Doc Type
Memo
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<br />-4- <br /> <br />'., . ... <br /> <br />Staff is not requesting Board action on this agenda item. This is an informational item that provides notice that . <br />CWCB will be initiating a Rulemaking process. Since this represents a proposed major revision to the CWcB's <br />Floodplain Rules, staff solicits any guidance or comments that the Board may have at this time. <br /> <br />Attachment A <br />CWCB Floodplain Rules and Regulations <br />Summary of Existine: and New Rules - Julv 2004 <br /> <br /> <br />1 <br /> <br />1 Describes the full and short titles of the rules and <br />r ulations <br />2 Describes the authority granted to the ewCB to promulgate <br />these rules <br />3 Describes the purpose of the rules, which focus on uniform <br />technical standards and the process for designation by the <br />Board. The scope of these rules apply to floodplain <br />information for zoning and subdivisions. They do not apply <br />to desi n criteria or dam failure flood ains <br />4 Provides definitions for 31 different flood-related terms <br />within the rules <br />N/A N/A <br /> <br />2 <br /> <br />3 <br /> <br />4 <br /> <br />5 <br /> <br />6 <br /> <br />N/A N/A <br /> <br />7 <br /> <br />5 . Provides details on the types of technical information (I.e. <br />topo, hydrology, hydraulics, etc.) that are required in order <br />for the information to qualifY as detailed. <br /> <br />NA <br /> <br />NA <br /> <br />NA <br /> <br />Address new FEMA and Corps terms and definitions <br /> <br />Proposed changes to the "5torm or Floodwater <br />Runoff Channels" that would include specific <br />language regarding the 100-year floodplain. 24- <br />65.1-403(3) C.R.S (new reference) states the CWCS <br />must address the 100-year floodplain for matters of <br />State Interest <br />The new rules should not be retroactive and should <br />not make Invalid the actions of the CWCS during <br />previOUS years. The engineering principles and <br />t;heorles are much the same; .however, the models <br />and techniques have changed for Improved and more <br />accurate flood lain determinations. . <br />. Use the bestlocallylreglonally/statelfederally <br />approved hydrology and the best available <br />. planlmebic information for the base map (streets, <br />corporate limits, etc.) . <br />. Use.the best hydraul1c analyses and. makes sure <br />that flood lines conform to the' best available <br />topographic info. <br />. Address the minimum drainage basin size for <br />floodplains vs. local drainage problems <br />. Address blockage of drainage structures during <br />floods <br />. Address ongoing urbanization of watersheds and <br />effects on flows <br />.' Address GIS and database format and technical <br />requirements <br />. Ensures conformance with FEMA contractor <br />gUidelines and specifications <br /> <br />. <br /> <br />. <br /> <br />Flood Protection. Water Project Planning and Finance. Stream and Lake Protection <br />, Water Supply Protection. Conservation Planning <br />
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