Snohomish County
Bid Date: 10/30/2024 at 10:00am
Pre-Bid: 10/22/2024 @ 01:00pm
Estimate: $1.3M - $1.7M
Trades: *General Engineering Contractor GEC: Engineering & Infrastructure Building; Opportunities for Subcontractors
The City of Snohomish is seeking a contractor to furnish all labor, tools, materials, and equipment necessary to complete the Motor Control Center (MCC) and Generator Replacement project at the Snohomish Wastewater Treatment Plant (WWTP). The work to be performed under this contract includes, but is not limited to, the following: • Measures for temporary erosion and sediment control. • Remove and salvage the existing emergency generator to the Owner and demolish associated appurtenances, duct, conduit, wire, and fuel piping inside the existing Generator Building. • Demolish the existing diesel storage tank and associated appurtenances, bollards, conduit, wire, and fuel piping. • Repair of the existing Generator Building roof following demolition of the existing generator exhaust duct. • Demolish the Generator Building inlet and exhaust louvers and replacement with new wall sections and windows. • Construction of a concrete pad near the existing Generator Building for installation of the new generator and providing three new bollards for protection of the generator. • Demolish and replace existing asphalt paving for construction of the new generator pad. • Construction of a concrete pad for installation of the new automatic transfer switch (ATS) adjacent to the south side of the Laboratory/Office Building. • Install a new Owner-furnished diesel generator with sound attenuating enclosure and sub-base fuel tank, including associated conduit and wire connecting the new generator to the new ATS. • Install a new Owner-furnished standalone ATS, including associated conduit and wire connecting the new ATS to the new switchboard. • Demolish the existing switchboard, Emergency Motor Control Center No. 1 (EMCC1), Normal Motor Control Center No. 1 (NMCC1), and their components, including an integral transfer switch and connection with Emergency Motor Control Center No. 2 (EMCC2) at the south end of the WWTP. • Provide temporary power to critical equipment during replacement of the switchboard, EMCC1, and NMCC1. • Demolish and replace the existing door and hardware for the Electrical Room of the Laboratory/Office Building. • Cut an opening and furnish and install a new doorway in the Electrical Room of the Laboratory/Office Building. • Demolish and replace the two existing cabinet doors for Main Control Panel 1A (MCP-1A). Demolish wiring for switches, lights, and LED displays mounted on the existing panel doors back to the terminal strips and PLC. • Furnish and install a second 8-port Ethernet switch and an Ethernet PLC card in existing MCP-1A. • Installation of a new Owner-furnished switchboard and EMCC1. Loads currently powered by NMCC1 will be consolidated into new EMCC1 South (EMCC1S) and EMCC1 North (EMCC1N), such that all loads for the north end of the plant will be fed from the new EMCC1 and be connected to backup power. Additionally, new EMCC1 will include a soft starter for the small screw pump, in addition to soft starters for the two large screw pumps as is currently provided within existing EMCC1. Replacement of EMCC1N must be completed within a period of 1 week, which may require after hours work. • Furnish and install new power cables in existing conduits from the existing electrical service to the new switchboard. • Furnish and install new power cables in existing conduits from the existing equipment (screw pumps, HVAC equipment, and water heater) to new EMCC1S. • Reconnect existing wires for existing loads to new Panels N-1 and E-1 in EMCC1S. • Reconnect existing wires for existing loads to new EMCC1N. • Furnish and install conduit and wire connecting EMCC1S to the new ATS and EMCC1S to EMCC1N. • Connect the new EMCC1N and EMCC1S starters to MCP-1A via Ethernet and modify MCP-1A programming to receive/send the same signals via Ethernet. • Connect the new generator and ATS to MCP-1A and modify MCP-1A programming to receive/send signals primarily via Ethernet with limited hardwired signals. • Modify the existing Supervisory Control and Data Acquisition (SCADA) system programming to display the same information and retain the same functionality with the new ethernet communications protocol. Bonds required. Prevailing wages.
Cory Morton
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Owner: City of Snohomish WA
Published 10/14/2024 on Construction Bid Source
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