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b. Among the most senior water rights in the Gunnison River Basin are those attributed to the Uncompahgre Valley Water Users Project -- ie. the Gunnison Tunnel and the Taylor Park Reservoir. This water development, authorized by the United States Congress in 1902, was the first Reclamation Project constructed by the United States Bureau of Reclamation, and it was developed to provide irrigation water to about 76,000 acres of land in the Uncompahgre Valley. The project includes a direct flow right in the total amount of 1,300 c.f.s. for water to be diverted directly from the Gunnison River through the Gunnison Tunnel to the Uncompahgre Valley. The tunnel was completed in 1912, and the direct flow right has a priority date of 1901. Another important feature of the Uncompahgre Project is the Taylor Park Dam and Reservoir I located on the Taylor River. Said reservoir was constructed in the mid-1930's to provide a supplemental supply of water for the UVWUA when water was no longer available for diversion through the Gunnison Tunnel under the direct flow right. The reservoir is decreed for 111,260 acre feet (its capacity when it spills), and has a total capacity of 106,230 acre feet when it is full without spilling. . Said water is directed for irrigation purposes. c. Another significant, though more recent, facility located on the Gunnison River is the Aspinall unit (formerly known as the Curecanti Unit) which is comprised of three reservoirs: Blue Mesa, Morrow Point and Crystal. The con- struction of this Unit was authorized by Congress through the Colorado River Storage Project Act (CRSPA) which was adopted in 1956. 1) CRSPA was adopted in recognition of the need of certain Upper Basin States (Colorado, New Mexico, Utah and Wyoming -- where the headwaters of the Colorado River and its tributaries arise) to provide water to Lower Basin states (Arizona, California, and Nevada) under the 1922 Colorado River Compact [see: Title 37, Article 61 of C.R.S. 15 . (1990 Repl. Vol. )] and to provide water to the Country of Mexico under a 1944 Treaty between the United States and Mexico. Under the 1922 Compact, the Upper Basin states must provide 75 million acre feet of water to the Lower Basin states in any 10 year period (or an average of 7.5 million acre feet per year) and the Mexico Treaty requires the United States to provide 1.5 million acre feet of water to Mexico annually from the Colorado River (and the Upper Basin share's said obligation about equally). As a result, the Upper Basin must supply about 8.23 acre feet of water at Lee Ferry (the dividing line between the Upper and Lower Basin states) on an annual basis. Unfortunately for the Upper Basin, the allocation of water between the two basins was based upon inaccurate data which calculated that at least 15 million acre feet of water was produced in the Upper Basin states each year, but in fact the figure is closer to 13 or 14 million acre feet. (see: testimony of 11