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<br />The populations and critical habitat of these endangered fish have been adversely affected or <br />modified by the construction and subsequent operation of Navajo Dam and operation of the dam <br />under its historic operating criteria could adversely affect the endangered fish in the San Juan River. <br /> <br />Reclamation is required to comolv with the ESA for ooeration of the facilities of the CRSP, <br />. . - . <br />including Navajo Dam, The operation of Navajo Dam is a key element of the San Juan River Basin <br />Recovery Implementation Program (SJRBRIP) to offset the adverse effects of flow depletions from <br />the San Juan River and allow continued water development in the Upper Colorado River Basin, <br /> <br />2. BACKGROUND <br /> <br />The Navajo Unit is one of four key features of the CRSP. intended to develop the water resources of <br />the Upper Colorado River Basin, The Navajo Unit is operated in accordance with the CRSP Act and <br />other applicable Reclamation laws, <br /> <br />The purposes for which the Navajo Unit is operated, and laws authorizing those purposes are <br />shown in Table L <br /> <br />Table 1. Authorized Purposes of the Navajo Unit and Enabling Legislation <br /> <br />PURPOSE LAW <br />Municipal, Industrial and Miscellaneous 1939 Reclamation Project Act (P.L 76- <br /> 260) & the 1956 Colorado River Storage <br /> Act (CRSP--P.L 84-485) & the 1968 <br /> Colorado River Basin Project Act <br /> (CRBP--P.L 90-537) <br />Flood Control 1939 Reclamation Project Act & 1956 <br /> CRSP Act & the 1968 CRBP Act <br />Improving Navigation 1939 Reclamation Project Act & 1956 <br /> CRSP Act & the 1968 CRBP Act <br />Regulating the !low of the Colorado 1956 CRSP Act & the 1968 CRBP Act <br />Ri ver <br />Reclamation of Arid Lands 1956 CRSP Act, the 1962 Navajo <br /> Indian Irrigation Project and San Juan <br /> Chama Act & the 1968 CRBP Act <br /> <br />3 <br /> <br />011)"'8 <br />.I._I <br />