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Agenda Item 4b May 12, 1995 Page Two '. , " Yampa River from Dinosaur National Monument upstream to Craig White River from the Utah stateline upstream to Rio Blanco Reservoir Gunnison River from its confluence with the Colorado River upstream to Delta Colorado River mainstem from the Utah stateline upstream to Rifle. CWCB staff conducted hydrologic analyses, topographic surveys, approximate hydraulic analyses and floodplain delineations. When it was available, detailed hydrologic and hydraulic information prepared by other agencies was utilized. The result was a four-volume report which provides approximate floodplain information for the four streams listed above: Vol. 1 Yampa River Vol. 2 White River Vol. 3 Gunnison River Vol. 4 Colorado River mainstem (57 miles) ( 52.5 miles) (43.5 miles) (93 miles) The CWCB has not solicited or received "letters of request" for the review and designation of floodplain study. Instead the designation and approval action is being pursued in accordance with Rule 9.D.2 of the Board's "Floodplain Designation and Approval Rules" (2CCR . 408-1). The Rule allows designation and approval action to be taken unilaterally by the Board, provided that "the Board shall notifY the affected communities in writing at least 45-days prior to Board meeting at which it will consider the designation and approval of floodplain iriformation within their jurisdiction." The Board will provide verbal notification of the proposed action at the May 1995 meeting, to be followed immediately by written notification to each of the affected local governments. The designation and approval resolution will be acted on at the July 1995 Board meeting. The affected local governments are listed below: Vol. I Craig Moffatt County Vol. 2 Rangely Rio Blanco County Vol. 3 Delta Grand Junction Delta County Mesa County Vol. 4 Rifle Parachute DeBeque Palisade .