Folsom Dam Raise: LRWD and Main Dam Construction

LRWD -The project includes the construction of a reinforced L-shaped concrete floodwall along the upstream hinge point of the LWD and RWD with a length of approximately 2,162 feet along the LWD and approximately 6,730 feet along the RWD. The existing embankment will be excavated to construct the floodwall. MAIN DAM – In this construction effort, the Top seal structure will be mounted above all of the bays of the main dam spillway in order to prevent overtopping of the Tainter gates during major flood events. Tainter gate will need to be retrofitted to account for the additional raise loading involving single-sided lifting. A vertical concrete extension to the top of the pier will provide the necessary elevated platform for the new hoist system. The new hoist system will be installed to handle increased hydrostatic PMF loads and the slightly heavier gates from the additional retrofit requirements.

Dam/Tunnel, New Construction.

Division 02 -	Existing Conditions, Subsurface Investigation.
Division 31 -	Earthwork, Site Clearing, Grading, Excavation and Fill, Subgrade Preparation, Excavation, Shoring, Tunneling and Mining, Tunnel Excavation.
Division 35 -	Waterway and Marine Construction, Dam Construction and Equipment.