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The concrete used in this contract was supplied by Whitewater Building Materials Corporation, located at 940 South Tenth street, Grand Junction, Colorado. Concrete Mix esegn The contractor submitted a 4,000psi concrete mix design which was reviewed and was approved with minor adjustments . Forms The contractor used Symons forms for the floor of the Fish Passageway Chute. However, the Symons forms the contractor initially began using for the Forebay Structure did not work well on the Fish Passageway Chute wall portion because of their weight and the forms were not easily adaptable to the chute wall portion because of the sloped floors. Curing omponnd The contractor used Res-X curing compound (clear) and Wax Emulsion Cure (white) from Burke, San Mateo, California 94402. Reinforcement Grade #60 rebar from Rocky Mountain Rebar, Delta, Colorado was used in all the reinforced concrete placed under this contract. Heating and Tenting Fiber reinforced visqueen was used to tent and two to three 100,000 btu kerosene heaters were used to heat and protect freshly placed concrete. Insulated blankets were sometimes used to protect the concrete when overnight tempratures allowed. December 8, 1995, contractor's carpenter crew begins setting forebay slab and footer forms for wingwalls. December 18, 1995, contractor places concrete at forebay slab and wingwall footers. Reference Photos: CN-1745-417-16NA and CN-1745-417- 17NA Note: reinforcement, waterstop and 42-inch diameter concrete pipe spindle for bypass pipe. December 19, 1995, carpenters strip footer forms from forebay slab and wingwall footers. Reference Photos: CN-1745-417-42NA and CN-1745-417-105NA Note: cold weather protection for forebay structure concrete placement. December 21, 1995, carpenter crew begins setting wingwall, and forebay exterior and interior Const-6