Site work and renovation of a water / sewer project in Oshkosh, Wisconsin. Completed plans call for the renovation of a water / sewer project; and for site work for a water / sewer project.

Winnebago County is requesting sealed bids to provide all labor, equipment and materials to rehabilitate a landfill leachate lift station system including, wet well/manhole components, control building and panels, metering building and equipment. Question Deadline 07/15/2025 at 3:00 PM CT - All questions about the meaning or intent of these Documents shall be submitted using the Question & Answer section of this project listed on the County's All questions, inquiries, and requests for clarifications and any said questions, inquiries, or requests for clarification received in any other manner will not be answered. Only responses issued by formal written addenda will be binding. A bid bond payable to Winnebago County in an amount of five percent (5%) of the bid amount must accompany the bid as a guarantee that if the bid is accepted, the bidder will execute and file the proper contract within ten (10) days after award of the contractWinnebago County owns and operates a solid waste management complex located in Oshkosh, Wisconsin. The landfill complex includestwo municipalsolid waste (MSW) landfillsites a few miles apart; the Snell Road Landfill and the Sunnyview Landfill site which also hosts a closed monofil sludge landfill, referred to as the Sludge Site. Both landfills are closed, with the Snell Road Landfill final cover sequence finalized in 1990, and the Sunnyview Landfill Co-Disposal and Sludge sites final covers completed in 2013 and 2017, respectively. The Snell Road Landfill leachate lift station was first installed in 1977 with upgrades made in 1986 and 1992. The system, controls, and buildings are aged and equipment is in need of repair and replacement. The leachate lift station consists of three main parts; 1) the wet well manhole containing the pumps, float controls and leachate piping, 2) the control building and electrical panel, 3) the metering building containing piping, valving, a flow meter, and sampling equipment prior to discharge to the city of Oshkosh sanitary sewer. The building north of the wet well houses the system control panel. In the past gas has entered this structure through the electrical and control conduits causing unsafe working conditions, potential for explosive atmosphere. In addition, the gases tend to corrode wiring and components leading to equipment failure. Inspection of the roof of the current building shows signs of deterioration with missing shingles and sagging on the sides. The existing wet well currently has visible buildup of material within the sides and bottom of the structure. The wet well currently contains two 7.5 horsepower submersible pumps (lead-lag) that pump the leachate to the metering building through ductile iron piping. Corrosion and buildup of material are present along the sides of the wet well. Parts of the equipment that is housed within the wet well also show signs of corrosion and are reaching the end of their useful life. Leachate is pumped from the wet well to the metering building through two below grade ductile iron pipes coming through the floor. Each line goes through a check valve and knife gate valve before condensing together with a wye joint. Following the wye is an air relief valve, a flow meter, and sample port before the leachate exits through the floor to discharge. The design life for the leachate lift station following rehabilitation is 20 years. Updates will be required for the control panel building, wet well, and metering building to achieve this. The control panel building currently needs to be updated to address safety concerns and to extend the life of the building. This includes: Furnish and install new control panel and all new components, wiring, and conduit in the building. Reuse the existing connect that activates "High Water" and "Power Out" alarm lights. Replace all conduits, seal offs, and wiring between the wet well and the building and prevent travel of gas from the wet well to the control panel building. Alter and seal building penetrations. Replace the roof of the building. Replace any sagged or damaged areas. Replace trim and soffit. Existing conditions of the wet well discharge pipes and sample return pipe.