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..... "/0"" U I,) L, 0:' 'd . . are only available since 1973. For the 1973 through 1980 period of record, the New Mexico share of Enterprise Ditch diversions averaged about 69 percent of the Enterprise-Colorado diversions and total diversions through the Pioneer Ditch averaged 2.l I percent of the Enterprise-Colorado diversions. These percent- ages were applied to provide estimates of the missing diversion records. Summa- ries of the diversion records and estimates for the missing data are presented in Appendix B. . . Mormon Reservoir . Mormon Reservoir on Hay Gulch is owned by the Red Mesa-Ward Reservoir Company and is used for storage of supplemental irrigation water. The reservoir has a decreed capacity of 1,176 acre-feet, but the actual capacity is approxi- mately 1,000 acre-feet according to the Water Commissioner. Early spring runoff in Hay Gulch is used as the main source of water for filling the reservoir. Additional water is occasionally diverted from the La Plata River through the Red Mesa-Ward Reservoir Inlet Canal with a capacity of about 100 cfs. Reser- voir releases are used to supplement the irrigation supply for the Old Indian, Joseph Freed, Revival, and Warren Vosburgh ditches. Incomplete storage content records have been maintained by the Water Commissioner, as summarized in Appendix B. The Water Commissioner has kept complete records of reservoir deliveries to the irrigation ditches, also summarized in Appendix B. . . . La Plata River Compact The La Plata River Compact, enacted in 1922, is an interstate agreement between Colorado and New Mexico concerning the use and distribution of waters of the La Plata River. The compact includes the following basic provisions: . I. At all times between the first day of December and the fifteenth day of the succeeding February, each State shall have the unrestricted right to use of all water which may flow within its boundaries. . 2. By reason of the usual annual rise and fall, the flow of said river between the fifteenth day of February and the first day of December of each -8- . ~i -";'';;.1<.