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.. . . INTRODUCTION This flood hazard analyses plan of study for the San Juan River and McCabe Creek in the vicinity of Pagosa Springs was jointly prepared by'repre- sentatives of the Colorado Water Conservation Board, the Upper Sanjuan Region Planning Commission, Archuleta County, the Town of Pagosa Springs, the San Juan Soil Conservation District, 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 responsibilities, 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 establ ishes 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 Publ ic Law 83-566, Recommendation 9(c) Regulation of Land Use of House Document No. ~65, 89th Congress, 2nd Session and in compTTance with Executive Order 11296, dated August 10, 1966. STUDY AREA The area of study includes the flood plains of the San Juan River and McCabe Creek in the vicinity of the town of Pagosa Springs. The study begins on the San Juan River near the southern end of Pagosa Springs town 1 imit and extends upstream approximately 7 miles northeast of the town. McCabe Creek is a tributary to the San Juan River and the study area extends north from its mouth, near Sixth Street, upstream through Pagosa Springs. Above Pagosa " Springs, McCabe Creek divides into two tributaries and the study area ends on both tributaries at the northern boundary of Section 13, T35N, R2W, approximately 0.3 of a mi Ie north of the city limit. Located primarily in the northeast part of Archuleta County, the San Juan River drains about 298 square miles above Pagosa Springs. Parts of the drainage area I ie within Mineral and Rio Blanco Counties. The San Juan River flows in a southwesterly direction, enters the east side of Pagosa Springs, and is joined with McCabe Creek near the center of town. Draining approximately 20 square miles, the McCabe Creek watershed lies to the north and west of Pagosa Springs. All of the study area for both the San Juan River and McCabe Creek is located in Archuleta County. Flood plains in the study area vary in width from about 200 feet to over one-quarter of a mile. The San Juan River is a major tributary to the Colorado River in the Upper Colorado, Water Resources Council Region. Location map showing the study area is on page 3.