Mayhew Drainage Channel Closure Structure Gate Hoist Improvement Project

Mayhew Drainage Channel Closure Structure Gate Hoist Improvement Project

In an effort to assist Sacramento County Department of Water Resources, Drainage Maintenance and Operations, the project proposes to install a catwalk structure with mechanisms for safely lifting and securing the closure structure steel flap gates across the Mayhew Drainage Channel. The Mayhew Drainage Channel drains an area south of the American River and west of Bradshaw Road known as Mayhew Slough. Near the connection of the channel with the American River, there is a control structure with steel flap gates, which function to prevent backflow from the river up the channel during high water elevation in the American River. The Mayhew Drainage Channel Closure Structure Gate Hoist Improvement Project proposes to install a catwalk structure with mechanisms for safely lifting and securing the closure structure steel flap gates across the Mayhew Drainage Channel to permit maintenance of the structure and removal of debris from behind the gates without the risk of accidental closure. The catwalk structure will be anchored on the walls of the drainage channel so that there would be no ground disturbance while constructing the catwalk. A concrete pad will be built to the east of the channel that will be used as a staging area for the project. The lifting mechanism would be housed on a trolley that would be moved along the catwalk, which would then lift the steel flap gate. With the gate open, maintenance workers and equipment can access the channel area behind the gate. Construction is planned for Summer 2022 occurring over approximately three months. As planned, construction would occur during the day with no nighttime activities.

Sacramento

Sacramento

Countywide

California Department of Conservation (DOC), California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW), California Department of Fish and Wildlife, North Central Region 2 (CDFW), California Department of Parks and Recreation, California Department of Transportation, District 3 (DOT), California Department of Water Resources (DWR), California Governor's Office of Emergency Services (OES), California Highway Patrol (CHP), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California State Lands Commission (SLC), Central Valley Flood Protection Board, Delta Protection Commission, Delta Stewardship Council, Office of Historic Preservation, State Water Resources Control Board, Division of Water Quality, California Regional Water Quality Control Board, Central Valley Sacramento Region 5 (RWQCB)

California Regional Water Quality Control Board, Central Valley Sacramento Region 5 (RWQCB)

Water Facilities (Stormwater channel)(Type Stormwater chann, MGD 0.000001)

Maintenance construction

Agriculture and Forestry Resources, Biological Resources, Drainage/Absorption, Flood Plain/Flooding, Hydrology/Water Quality, Vegetation, Wetland/Riparian