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<br />(b) !Juring the year covered by this report the Administration has <br />received excellent cooperation from all agencies referred to in the <br />foregoing provisions of the Compact. The United States Geological <br />Survey has continued the operation of the compact g::J.ging stations <br />and the analyses and compilation of the hydrologic data presented <br />in this report and used in lhe administration of the Compact. Thf:' <br />Corps. of Engineers continued to operate the conservation pool of <br />John Martin Reservoir in accordance with the terms of the com- <br />pact and the orders of the Administration. <br /> <br />7. Water Supply, Reservoir Operation and Hydrologic Data. <br /> <br />At the beginning of the Compact Year, lhewater stored in John Mar- <br />tin Reservoir was 186,100 acre feet at midnight on October 31, 1966. <br />However, because of a demand on the reservoir by Colorado through <br />October '31, routine operations of closing the gates was not completed <br />until 8:30 A.M. on November I, allowing 311 acre feet to be released <br />in the early morning hours. The carryover storage from the 1965 flood <br />plus 1966 runoff was still of considerable magnitude being fourth in <br />size since the reservoir has been in operation, <br /> <br />-- <br /> <br />'lnf(ow into the reservoir during t~e winter storage months (Nov. 1, <br />1966 througll Ma.rdl 31, 1:J67) was 14,410 aCre feet. neleases during <br />the same period w~re -1,417 acre feet which included 311,acre feet <br />mentioned above, 3,51!) acre feet river flow demanded by Colorado, and <br />587' acre feet seepage past the dam when the gates were closed. Colo- <br />rado demand for river flow averaged about 25 c.f.s. daily during the <br />periods of November 1 through December II, 1966, and February 20 <br />through March 31, 1967. Storage in the reservoir at the beginning of the <br />irrigation season April 1, 1967 was 197,949 acre feet at a gage height of <br />3834.10. However, the Corps of Engineers conducted a reservoir capacity <br />resurvey during September 1966 and based on this data a new Area- <br />Capacity Table was issued for the reservoir effective twenty-four <br />hours later at midnight April I, 1967 at a gage height of 3833.86 and <br />a new capacity of 185,838 acre feet. The Corps of Engineers operation- <br />al report for April 1 at 2400 hours indicates the amount released was <br />1920 acre feet to meet a demand of 2000 acre feet by Colorado and <br />Kansas. Thus, the difference between the two area capacity tables was <br />10,191 acre feet, which represents the loss in storage space at this <br />elevation due to siltation since the last survey in March 1962. <br /> <br />UHeavy demands for water by both states continued through April <br />and most of May, Rains the latter part of May caused the gates to be <br />closed at 8:45 a.m. on May 30 and they remained closed until 8:45 a.m, <br />on June 5. During the remainder of June and the first three weeks of <br />July most of the Colorado demand and all of Kansas demand were <br />satisfied by river flows. As a result of fluctuating reservoir inflow, <br />eleven change orders were issued in June, seventeen in July and fourteen <br />in August. During this period 50,536 acre-feet were stored concurrentl}' <br />with releases. This additional water in storage made up almost one- <br />fifth of the total releases made in the irrigation season. John Martin <br />Reservoir was not emptied during the year but water in storage at the <br />end of the irrigation season on October 31, 1967, was 14,999 acre-feet. <br /> <br />-9- <br />