Cofferdam construction with supersacks and sheet pile installations, temp access bridge installation, temporary piping and bypass pumping, in-river improvements with large boulders to fine sediment, demolition of existing; dam, fish ladder, spillway, irrigation canal, and abutment, clear and grubbing, tree removal, access road construction, drainage/stormwater improvements, yard piping including 42” and 36” HDPE installation, channel construction, and rock slope protection