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000 95\7 CUMULATIVE IMPACTS Cumulative impacts are impacts on the environment, which result from the incremental impact of the action, when added to other past, present, and reasonably foreseeable future actions. ' Cumulative impacts can result from individually minor but collectively significant actions taking place over a period oftime. Past and present activities that have affected river related resources in the area include irrigation and hydropower generation, urban development, gravel mining and river recreation. The Recovery Program has implemented floodplain restoration projects, fish passages and fish screen, and other Recovery Implementation Program Action Plan (RlPRAP) elements, which cumulatively have result in beneficial impacts on the endangered Colorado River fishes. Implementation of all or any of these projects has ,affected and continues to affect the human environment including but not limited to water qualitY, water rights, socioeconomic and fish and wildlife resources. Incremental cumulative impacts associated with implementation of the . proposed action are anticipated to be too small to measure. . 'SUMMARY AND ENVIRONMENTAL COMMITMENTS In summary, the primary effect of the proposed action would minimize incidental take of Coloradopikeminnow, razorback sucker and bonytail in the Redlands Power Canal. Canal head loss as a result offish screen would likely reduce RWPC ability to generate hydroelectric power at the Redlands Power Plant. RWPC is investigating installing flashboards at the Diversion Dam. t~ recover the head loss. R WPC would lose 4 months of revenue from hydropower generations ' while the fish screen is being constructed. Local wildlife may avoid the project area during construction; however this impact is predicted to be short-term in nature, In addition, water quality woul~ likely be temporarily impacted during construction ofthe fish screen bypass pipeline, however this impacted is predicted not to be significant because best management practices would be applied. The proposed action would have no affect on water rights, cultural and historic properties, environmental justice or Indian Trust assets. Mitigation Measures 1) Temporary construction easements would be obtained from RWPC prior to beginning construction of the fish screen. 2) Section 404 authorization would be obtained from the Army Corp:3 of Engineers prior to initiating construction activities. 22