The project entails installation of a new, land-based, individual grinder pump system and decommissioning of the existing sewer main located under water in Lake Washington. Key components of the project are anticipated to include: Approximately 3,000 feet of 2 to 3-inch low pressure wastewater force mains. City owned electrical distribution system to serve individual grinder pump stations including distribution conduit, transformer stations, backup generator, and single point of connection to PSE. Installation of 56 (55 homes and 1 park) grinder pump stations. Installation of 120 LF of 8-inch gravity sewer main with two side sewer connections. Connection of individual properties to the grinder pump system. Decommissioning of the existing flush station and in-lake sewer main by flushingthe main, removing 3 lake bottom manholes, and plugging the decommissioned ends of the sewer main and laterals. Associated civil work, including excavation, trenching, paving, landscaping, and restoration. Complex stakeholder coordination and traffic control given the residential nature of the project area and limited access. The City is anticipating a federal Community Project Funding grant. If received, the construction management company would be responsible for ensuring the project adheres to federal, state and local requirements. This includes but is not limited to assisting with environmental reviews, ensuring compliance with the Davis-Bacon Act, safety regulations, and federal procurement regulations.
