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Executive Summary DEIS - Navajo Reservoir Operations 5-21 Comparison of Aiternatives Table 5-5 summarizes the impacts associated with each alternative retained for detailed analysis. , 250/5000 (Flow Recommendations) Resource No Action Alternative Alternative 500/5000 Alternative Navajo Reservoir Reservoir operated for Reservoir operated Reservoir operated for operations and content flood control and existing for flood control. flood control and uses; average July endangered fish, full endangered fish, content 1.52 million NIIP water supply; potential shortage to acre.feet. average July content NIIP water supply; 1.35 million acre-teet. average July content t.30 million acre-teet. San Juan River monthly Minimum flow 500 cfs; Minimum flow 250 cfs; Minimum flow 500 cfs; flows at Archuleta (near Average annual flow of Average annual flow of Average annual flow of dam) 1,015 cfs; average July 775 cfs; average July 780 cfs; average July flow 1,050 cfs; average flow 385 cfs; average flow 540 cfs; average January flow 880 cfs. January flow 300 cfs January flow 500 cfs. San Juan River monthly Minimum flow 65 cfs; Minimum flow 500 cfs; Minimum flow <100 cfs flows at Bluff, Utah Average annual flow of Average annual flow of when reservoir storage 1,900 cfs; average June 1,670 cfs; average June exhausted; average flow 4,250 cfs; average flow 4,680 cIs; average annual flow of 1,670 cIs; August flow 1,570 cfs. August flow 1,110 cts. average June flow 4,110 cfs; average August flow 1,170 cfs. Water uses and Water supply adequate Water supply adequate Water supply adequate resources to meet existing uses; to meet existing uses; to meet existing uses future water uses completion of NflP and with possible additional including NIIP ALP Project would shortages in dry years; completion and ALP occur. Best opportunity completion of NIIP and Project assumed not to to accomplish future ALP Project included occur. water development. with possible shortages. Indian Trust Assets/ Two types of ITA's Two types of ITA's Two types of ITA's Environmental Justice potentially affected-- potentially affected- potentially affected-- water uses and cultural water uses and cultural water uses and cultural resources on trust lands. resources on trust lands. resources on trust lands. Least opportunity for Positive impacts to all Shortages to water development of water Tribes by protecting projects would Occur and uses. water development that better chance for future has ESA and NEPA water development than compliance-allows best No Action. possibility for future water development. Table S-5-Summary comparison of altematives retained for further analysis 00582