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In January 1989, the Corps completed a "section 205 Reconnaissance study For Flood Control, Colorado River, Grand Junction, Colorado." The purpose of the study was to determine if a Federal interest existed in pursuing feasibility studies for flood control at the study reach. The study reach along the Colorado River extended from station 386.6 to about 387.4, a segment of river immediately upstream of the confluence with the Gunnison River. The study describes the flood problems of the area and provides summaries of alternative actions, economic evaluations of plans, environmental evaluations, and conclusions and recommendations regarding further Federal involvement. In May 1989, J.F. Sato and Associates, Inc. completed the "Hydrology Report, Flood Insurance Studies in Mesa County, Colorado," for the FEMA. The study continued the revision of the river hydrology initiated by the Corps in 1985. The Sato study concentrated on the reach of the river from DeBeque tQ the Colorado state line. The purpose of the study was to'provide current base information to help revise the Flood Insurance study for the Grand Valley area. The study includes hydrologic analysis to determine flow-frequency relationships for the mainstem of the Colorado River and several significant tributaries. In November 1991, a report entitled "section 205 Reconnaissance study for Flood Control, Colorado River, Riverside, Colorado," was completed by the Corps. The study evaluated the Colorado River from immediately downstream of the confluence with the Gunnison River to Highway 340 (station 385.6 to 386.6) in the Riverside and Rosevale areas of Grand Junction and Mesa County. The reconnaissance study determined that there were no economically justified flood control alternatives which would warrant further Federal action. . Also, in November 1991, the corps prepared the draft report, "section 205 Feasibility study for Flood control, Colorado River, Grand Junction, Colorado." Following public review, the report will be finalized. The report recommends construction of.. a levee to provide a 500-year level of flood protection to a commercial/industrial and residential area of Grand Junction. The levee would extend upstream and be set back on the right bank, beginning at the Denver and Rio Grande Western Railroad crossing for a distance of 3,100 feet (refer to site F of the levee inventory). The feasibility study is scheduled to be finalized in the spring of 1992. If approved and funded, construction of the levee could begin in 1993 or 1994. 5. Hvdroloqv. Flooding problems along the Colorado River are primarily the result of excess snowmelt runoff. The worst flooding occurs when 4