Description
The U.S. Fish and Wildlife Service is seeking design-build services for the replacement of the North Flume at the Sacramento National Wildlife Refuge in Willows, California. The project involves designing and installing a new flume, adjacent abutments, spillway connection to Logan Creek, and surrounding earthwork. The contractor will be responsible for obtaining all necessary permits and ensuring that the project is completed in accordance with environmental regulations. The project is expected to last 24 months, with 35% of the design and permitting phase to be completed within 12 months, and the construction phase to be completed within 12 months after completion of the design and permitting phase. Some key features of the project include:
• Designing and installing a replacement flume with a conveyance capacity that meets or exceeds that of the existing flume
• Designing and installing walkway surfaces and associated removable handrails
• Designing and installing stoplog slots and providing replacement wood stoplogs
• Demolition, removal, recycling, and/or disposal of the existing flume infrastructure
• Installation of erosion and sediment control measures, vegetation, and stabilization of all disturbed or impacted areas
• Ensuring that the structure is designed to provide a minimal service life of 50 years and resist forces from variable flows.