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,. , co N o o c..., c' .,...., algae and because these plants would not live in the piped laterals due to lack of sunlight. The use of fertilizers and insecticides would not change perceptibly. 8. Cultural Resources No evidence has been found of cultural resources that would be endan- gered by the development. An additional survey for cultural resources has been conducted in the areas to be affected by detention ponds and inter- ceptor ditches, and no sites were found. Should any sites be discovered during preconstruction surveys or construction activities, they would'be evaluated by a competent professional, and Bureau of Reclamation proce- dures for complying with pertinent legislation and regulations would be implemented. 9. Unavoideble Adverse Effects The visual characteristics of the area would be changed by elimina- tion of the present irregular earth canal channel and the construction of a very regular concrete lined channel. The present open laterals would disappear as the laterals were placed in buried pipe and the ground surface reshaped to conform to the surrounding land. Some people would find these changes adverse. During the 3-year construction period wildlife would temporarily be disturbed along the canal and laterals. About 45 acres of wildlife edge habitat would be converted to crops or less dense edge habitat, and about 225 acres of various kinds of habitat would be altered or reduced in quality. Some species would potentially suffer population reductions even though the development of lands for wildlife and the revegetation of disturbed areas should compensate for the adverse impacts. 10. Short- and Long-Term Envirornncntal Effects Construction of Stage One would serve as a short-term stimulus to the local economy through the estimated $2,260,000 direct payroll and the pur- chase of goods and services from local suppliers. Water users in the Lower Colorado River Basin would experience an estimated long-term benefit of $667,000 annually based on the Stage One salinity reduction of 2.9 mg/L at Imperial Dam. Wildlife species adapted to the changes in vegetation types would realize long-term population increases. The development would cause short-term losses in the form of temporary disturbance to humans and animals by construction activities and the disruption of wildlife by temporary vegetation destruction. Long-term population losses would occur to wildlife species not adapted to the changes in habitat resulting from the development. C-5