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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />1 O"~) <br />.1tJ <br /> <br />14 <br /> <br />reach) . <br /> <br />Tabl. 2.2. Non-native Fish Fauna of the San Juan River Basin <br /> <br />Species Status <br /> <br />Threadfin Shad <br />Cutthroat Trout (Snake River subspecies) <br />Rainbow Trout <br />Brown Trout <br />Kokanee Salmon <br />Northern Pike <br />Red Shiner <br />Common Carp <br />Golden Shiner <br />Sand Shiner (Undocumented) <br />Fathead Minnow <br />White Sucker <br />BlaCk Bullhead <br />Channel Catfish <br />Plains Killifish <br />Mosquitofish <br />Striped Bass <br />Green Sunfish <br />Bluegill <br />Smallmouth Bass <br />Largemouth Bass <br />White Crappie <br />Black Crappie <br /> <br />LP <br />UC <br />C <br />C <br />NR <br />LP, NR <br />C <br />A <br />NR <br /> <br />UC <br />R <br />R <br />A <br />UC <br />C <br />'LP <br />R <br />R <br />R <br />R <br />LP, NR <br />NR <br /> <br />A - Abundant, generally distributed and typically numerous <br />C - Common, generally distributed and typically not numerous <br />UC = Uncommon, not generally distributed and typically not <br />numerous <br />R - Rare, not generally distributed and never numerous <br />LP - Lake Powell, may rarely enter riverine habitats <br />NR - Navajo Reservoir, may rarely enter riverine habitats <br /> <br />2.2 WATER DEVELOPMENT <br /> <br />2.2.1 Hiatoric F1awa <br /> <br />The San Juan River is a typical southwestern river, exhibiting <br />highly variable natural flows, both annually and monthly. Mean <br />annual discharge from 1914 to 1986 was 2,574 cubic feet/second <br />(cfs) near Bluff. High flows of 69,986 cfs and low flows of 0 <br />cfs have been recorded at the Bluff, Utah, gage. <br /> <br />Prior to the construction of Navajo Dam, the hydrograph was <br />