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<br />"i <br /> <br />The headwaters of the Colorado River mainstem are also home to a booming recreation and <br />second home industry. Like the Green River Basin, the Colorado River Mainstem Basin is rich in <br />oil shale and other energy resources. <br /> <br />The Colorado River mainstem is also home to four fish species listed under the ESA, but its <br />stream habitat has been segmented by impoundments and diversion dams. Usable or occupied habitat <br />on the Colorado River mainstem is much smaller than the Green River system. <br /> <br />San Juan River Basin: The San Juan River is the third and southern most of the upper river's <br />major sub-basins. The San Juan River drains approximately 23,000 square miles38 of four different <br />states: Arizona, Colorado, New Mexico and Utah. While its drainage basin may cover four states, <br />almost all of its flow originates on the southern slopes of the San Juan and San Miguel Mountains <br />in the State ofColorado.39 <br /> <br />The estimated natural flow of the San Juan River as it enters Lake Powell is approximately <br />2.3 maf per year.40 The basin drains all or parts of five Indian reservations: the Southern Utes and <br />Ute Mountain Utes in Colorado, the Jicarilla Apaches in New Mexico, the White Mesa Utes in Utah <br />and the Navajo in New Mexico, Utah and Arizona. <br /> <br />Through the San Juan-Chama Project, waters from the San Juan headwaters are diverted <br />across the Continental Divide into the Rio Grande River Basin where it is used for agricultural and <br />municipal purposes including as a municipal supply for Albuquerque and Santa Fe. <br /> <br />Energy resources in the San Juan Basin include coal, oil and natural gas but no oil shale. The <br />river is habitat for only two of the four fish species listed under the ESA,4' the razorback sucker and <br />the Colorado pikeminnow. <br /> <br />38 According to the Engineering Advisory Committee report drainage area by states table, page 33: 20% Arizona, 25.6% Colorado, <br />42% New Mexico, and 13.4% Utah. Data are for drainage above Bluff, Utah. <br /> <br />39Engineering Advisory Committee Report, part II, page 20, Colorado contributes 86.7% of the flow of the San Juan River. <br /> <br />40The author's estimate using Engineering Advisory Committee Report. See footnote 29. <br /> <br />41 Within the Upper Basin, there are two separate Recovery Programs. One is for the San Juan River Basin and one is for the remainder <br />of the Upper Basin. <br /> <br />Page -15- <br />