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Significant environmental and social parameters Conwnunities Table S-l.--Comparative environmental and social impacts of alternatives (continued) No action No impact. Modified selected p1 an 1982 Inundate the communities of Weldona, Goodrich, and Orchard. Selected plan 1976 Inundate the communities of Weldona, 'Goodrich, and Orchard. Further ground.. water development No impact. Wel d County reservoir development Inundate the community of Hardin. Schools No schools in acquisition area. Water quality Prime fannl ands No impact. No significant change; however, the cont tnued 'improve- ment of water qu'a 1- ity over time is expected due to the passage of stricter water quality standards. Continued high levels of TDS, nutrients and bacteri a. Mi nor increase due to lDcalized wuter deve 1 opment for irrigation over time. floOd protection Continued flooding potential. Inundate Weldon Valley School. Reservoir outflow will be free of, sediment. Water temperature 'will be more uniform through the year than under 'II No action." No signi.. fican~ change in dissolved mineral content. The stabili- zation of river flows will tend to decrease pesticide concentrations during periods of historic low flow. High probability for eutro- phication and associated algal blooms. Sli9ht potential for stratification and low D.O. in deeper waters.. 10,988 acres of irrigated crop- land would be required fur the project, the project would impound water for irrigating 287,070 acres of land. Would provide 233,000 acre- feet of excluSive flood control storage. Inundate Weldon Valley School. Reservoir outflow will be free of sediment. Water temperature will be more uniform through the year than under "No action." No signi- fiCant change in dissolved mineral content. The stabili- zation of river flows will tend to necrease pesti~ide concentrations during periods of historic low flow. High probability for eutrophication and associated algal blooms. Slight potential for strati- fication and low 0,.0. in deeper w.aters. 16,894 acres of irrigated crop- land would be required for the project, the project would impound water for irrigating 287,070 acres of land. Would provide 475,000 acre- feet of exclusive flood control storage. No impact. Without a provision for aquife.r recharge~ the possi- bility exists that the mineral concen- tration will take place. Potential bacteria1 contami- nation of aquifer. Increase of irri- gation commensurate with ground water development. Continued flooding potential. Reservoir outflow will be free of sediment. Water temperature will be more uniform through the year than under "No action.1I No signi- ficant Change in dissolved mineral content. The stabili- zation of river flows will tend to decrease pesticide concentrations during periods of historic low flow. High probabil ity for eutrophi ca- tion and associated algal blooms. Sl ight potent; a1 for stratification and low D.O. in deeper waters. . 8,601 acres of irrigat~d crop- land would be required for the project, the project would provide 75,000 acre-ft for irrigation. Would provide 475,ODO 'cre- feet of exclusive flood control storage. ....".,. '~~ :1;~<~.