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. INTRODUCTION This flood hazard analyses plan of study for Cottonwood Creek in the vicinity of Buena Vista was jointly prepared by representatives of the Colorado Water Conservation Board, Chaffee County, the Town of Buena Vista, and the Soil Conservation Service. The purpose of the Plan of Study is to describe the objective of the study, the intended uses of the data and report, the intensity of investigations, inter-agency coordination involved, study responsi- bilities, scheduling, and funding arrangement. In Colorado, the Soil Conservation Service and other federal agencies are currently engaged in flood hazard studies in cooperation with the Colorado Water Conservation Board. As coordinator for all water studies in the state, the Colorado Water Conservation Board establishes priorities and schedules these studies on a priority basis. The Colorado Water Conservation Board and the Soil Conservation Service entered into a joint coordination agreement for flood hazard analyses on January 27, 1972. . The Soil Conservation Service, United States Department of Agriculture, carries out flood hazard analyses under the authority of Section 6 of Public Law 83-566, Recommendation 9(c) Regulation of Land Use of House Document No. 465, 89th Congress, 2nd Session and in-compliance with Executive Order 11296, dated August 10, 1966. STUDY AREA The area of study includes the flood plains of Cottonwood Creek in the vicinity of the Town of Buena Vista. The study begins at the confluence of Cottonwood Creek with the Arkansas River and extends upstream through Buena Vista and in a westerly direction to the San Isabel National Forest boundary. Located in the west central part of Chaffee County, Cottonwood Creek drains about 104 square miles. Flood plains in the study vary in width from about 100 feet to over three-quarters of a mile. Total length of the study reach is approximately 6 ~iles, The Arkansas River is a major tributary to the Arkansas-White-Red, Water Resources Council Region. Location map showing the study area is on page 3. .