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<br />States Geological SlIrv~y, the Comullssiol1er of Rcdamdtion, and
<br />thl..: Chid of Engineers, United States Army, to colldborate ,;",'ith
<br />the Administrinion and with appropriate State offic]als in .such de-
<br />termination ;lnd correlation of stream flov,' and of related datil. The
<br />c,\rrying out of the cooperative studies and actlvitic.s he-rein men-
<br />tioned is assigned, under the By-Laws of the Administration, to the
<br />Engineering Committee.
<br />
<br />(b) The above-mentioned cooperative studies anJ ilCtlvitics of
<br />the Administration, during the period covered by this report, have-
<br />consisted of the- establishment uf gitging stdtions, a special silt survey
<br />of Juhn Martin Reservoir by the: Corps of Engineers, and the com-
<br />pilation of hydrological data for the purpose of making this report
<br />and for the administration of the Compact provlslOns.
<br />
<br />7. Water Supply, Reservoir Operation and
<br />Hydrological Data
<br />The Compact year. commencing on Nm'emFer 1, 1949. began
<br />with a carry-n\"Cr in the John Martin Rescr\"oir of 123,700 acree-feet
<br />(If water. During the 'Ninta sturage pcnuJ, the \\ldter in sturit;;:c
<br />incrcJsecJ to 158,700 Jere.feet. This increase, 30.000 3crc-fect. was.
<br />hut (\() ~~cr (ent of the .r~,\)7.J, i-I.crc.-fcd ,l..:-.:umulfiting clllrin~ the.. lik....
<br />perinu thc yc:n before. Intlo\v into the reservoir through the irrig;t-
<br />tioll ~,~;lo;()Jl April 1. 19,0, to Octoher 31, 19iO. \;..:t." f03.722 a~rc-
<br />feet. The total inflO\v into the reservoir for the Comp3:ct year was
<br />132,530 acre-feet, compared to 2n,100 acre-feet (revised) during
<br />the preceding Compact year. The year ended with 'i'8,500 acre-fect
<br />remaining in storage.
<br />The early part of the 19;0 irrigation season was very dry. Be-
<br />ginning on April 1, 1950, both states made large demands on stored
<br />water. This continued until June 20, 1950, when, due to the occur-
<br />rence of rains, Kansas cancelled its demand for '-\'ater. Rainfall in
<br />Kansas became abundant during July and August and Kansas made
<br />no further demand during th~ season for water. The low in reser-
<br />voir storage ,-vas reached on July 18,19)'0, when the supply dropped
<br />to 31,297 acre-fect. During the remainder of the season, inflo\l,'
<br />exceeded the demands of Colorado and reservoir storage increased.
<br />Included as Appendix D are the follo\l.,'ing hydrologic data.:
<br />0-1. Daily discharges, Arkansas River at Pueblo, Colorado,
<br />monthly totals corrected for transmountain water.
<br />D-2. Daily discharges, Arkansas River at Las Animas, Colo-
<br />rado.
<br />D-3. Daily discharges, Purgatoire River at Las Animas,
<br />Colorado.
<br />D-4. Daily discharges, Arkansas River at the Colorado-Kan-
<br />sas State Line.
<br />D-5. Daily discharges, Arkansas River at Garden City,
<br />Kansas.
<br />
<br />9
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