Site work and new construction of a water / sewer project in Nashua, New Hampshire. Completed plans call civil work for a wastewater treatment plant.

Infrastructure upgrades for the Leachate PFAS Removal and Destruction Pilot Test Project at the Four Hills Landfill. Deadline for Bidder Questions Wednesday, June 3, 2026 at 2:00 PM Inquiries must be submitted in writing, citing the IFB title/number, Page Section, and must be received to: City of Nashua 229 Main Street, Room 11 Nashua, NH 03061 purchasing@nashuanh.gov The City of Nashua, Division of Public Works, is soliciting bids from qualified contractors to provide the infrastructure upgrades portion of the Leachate PFAS Removal and Destruction Pilot Test Project at the Four Hills Landfill. The work consists of construction layout and documentation survey, excavation and backfilling, installation of pre-cast concrete and HDPE manholes and pump station structures, pipe trenching, and furnishing, welding, and installation of HDPE pipe and fittings (including double-walled HDPE pipe), furnishing steel pipe, fittings, and valves, furnishing, installing, and testing a leachate pump, liquid level sensors integrated with a control panel, preparing an HDPElined secondary containment work pad, and installation of electrical service (including trenching and conduit installation). All work shall be coordinated with landfill operations staff and performed in a manner that maintains continuous access to active landfill areas while protecting existing utilities and infrastructure. Award is subject to final approval.