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_A ....., ~ _JJl . During water year 1983, the flow at Thomasville was less than the set rates on two occasions. The first time was from May 14 through May 22 when Ivanhoe diversion was the only site diverting. It was shut down as soon ,as possible. The second occurrence was at the end of August when the flow- dropped for two days. When this situation occurs, the diverions into the project sytem are decreased or stopped, whichever is necessary to meet the bypass requirements. Only the Hunter Creek system, which drains into the Roaring Fork River, continues diverting water into Charles H. Boustead Tunnel. . Exhibit 3 shows the flows at the Thomasville River gaging station and the minimum flow requirements. Project Diversions The water year 1983 outlook used a project diversion of 60,000 acre-feet for the most probable runoff condition. The February 1, March 1, April 1 and May 1 forecasts, based on Soil Conservation Service snow course data, pro- jected' diversions of 57,040 acre-feet, 42,400 acre-feet, 68,900 acre-feet, and 83,300 acre-feet, respectively. The actual diversion was 87,670 acre-feet as measured at the outlet portal of the Charles H. Boustead Tunnel and 3,120 acre-feet conveyed through the Twin Lakes Tunnel for a total import of 90,790 acre-feet. The maximum mean daily import through the Charles H. Boustead Tunnel was 950 ft3/s on June 24, 1983, with a maximum instantaneous peak of 963 ft3/s. A senior call was not made on the Colorado River; therefore, no releases from Ruedi Reservoir were necessary to replace project diversions. The yearly total imports, the water used for Twin Lakes Canal Company exchange, and the accumul ated imports to the Arkansas River are shown on table 3. The 12 years of accumulated imports total 534,600 acre-feet for an average of 44,550 acre-feet per year. The discharge records for all diversions in water year 1983 are shown in appendix A. Measuring Devices During water year 1983, no additional river gagin9 stations were verified by the Colorado Division of Water Resources Division 5 Engineer, as having an acceptable rating.table for the measuring device. Twin lakes Exchange On September 13, the Twin Lakes Reservoir and Canal Company began delivering water into the Roaring Fork River drainage in exchange for water in Twin Lakes. The exchange followed the operating criteria as shown in appendix B. The runoff season was determined to be a normal runoff year and settings 7 . ...