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Executive Summary FEIS - Navajo Reservoir Operations Table S-5-Summary comparison of alternatives retained for further analysis (continued) Resource River water quality No Action Alternative Existing conditions continue or improve due to water treatment and erosion control advances. 250/5000 Alternative Dilution of pollutants reduced when minimum releases occurring; additional dilution during high releases. Improved channel maintenance. 500/5000 Alternative Similar to existing conditions although dry year shortages may lead to increased water quality issues. Improved channel maintenance. Reservoir water quality I Existing conditions I Existing conditions I Existing conditions continue. continue. continue. Socioeconomics Special status species River vegetation and wildlife downstream from dam Adverse impacts could occur as water development, including completion of the NIIP and ALP Project, is uncertain. Employment opportunities adversely affected, but recreation- based economy maintained. Few Flow Recom- mendations to conserve endangered fish met; no significant effect on other endangered species. Few adverse impacts to wildlife. No adverse impacts to wetland riparian vegetation. Adverse impacts on trout fishery economy and hydropower; economic benefits associated with water development will occur. All Flow Recommenda- tions to conserve endangered fish met; no significant effect on other endangered species. No major loss of riparian habitat, though long- term reduction in vegetation vigor may occur. This could reduce riparian habitat for some wildlife species. Economic benefits associated with water development occur, although reduced due to water shortages. Employment oppor- tunities adversely affected, but recreation- based economy maintained. Some Flow Recom- mendations to conserve endangered fish partially met; no significant effect on other endangered species. Inconsequential effects on existing riparian vegetation and associated wildlife habitat.