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Scope of Work:
- The project required clearing the existing dam face and constructing a new overflow spillway.
- The spillway will control excess flows when the reservoir is filled to its 123 million gallon capacity.
- The existing outflow structure was re-constructed to upgrade the outlet piping and control house.
- Clearing and site preparation at this wilderness setting required major work including 7,800cy of structure excavation and fill, 1,200 tons of subbase, 1,600cy of cast-in-place concrete for footings and walls.
- Work also included the placement of 1,020cy of cast-in-place spillway slab as a protective lining for a 27 degree embankment slope; 5,000cy of rip rap stone slope protection; and 290 lineal feet of fiberglass liner pipe.
- Other work included concrete demolition, by-pass pumping of water and the installation of pre cast concrete liner boxes and roof planks.
- Unique features of the work include horizontal boring of a 36” diameter fiberglass casing pipe for the new outflow; lining of the existing outflow tunnel with a 48” fiberglass pipe; placement of 1,020cy of cast-in-place concrete on a 27 degree embankment slope utilizing a company owned specialized GAMACO slope finishing machine; and drilling a 42” diameter hole through an 8 ‘ thick concrete wall for the new outflow pipe.
- Our project management team worked closely with the Owner to adjust the scope of work and reassess contract requirements to allow for cost reductions. These reductions enabled the project to comply with the budget constraints of the Owner.
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