MWWTP Utility Water Piping & Valve Replacement (UN 1181)

The Board of Commissioners for Charles County is requesting sealed bids for replacement and installation of utility water piping, valves, hydrants, and appurtenances at the Mattawoman Wastewater Treatment Plant under ITB UN 1181, with bids due July 8, 2026 at 11:00 a.m. A mandatory MWBE subcontractor goal of 30.04% applies.

The scope covers approximately 540 linear feet of exposed piping replacement and approximately 26 underground valve replacements throughout the treatment plant, including five construction phases spanning service tunnels, water mains, and secondary clarifier areas. Piping materials include ductile iron pipe (DIP) in 8-inch, 12-inch, 20-inch, and 36-inch diameters with epoxy interior and exterior coatings. The contractor must develop and implement a Maintenance of Plant Operations Plan with 30-day advance notice for shutdowns, limit facility outages to four hours without supplemental services, maintain county employee presence during shutdowns, and bear all county overtime and vacuum truck rental costs. Submittals include shop drawings, manufacturer certificates, operation and maintenance manuals, and mill test reports. The contractor must furnish all labor, materials, temporary utilities, dewatering, site drainage, dust control, and sanitary facilities at no extra cost.

Bidders must demonstrate a minimum of three years of active experience in the field and provide evidence of no fewer than three completed projects of equal or greater magnitude within the past five years, specifically in replacement of mechanical and plumbing piping systems in active treatment plants. The contract is subject to prevailing wage requirements. The selected contractor must complete all work within 250 consecutive calendar days after written Notice to Proceed.

A non-mandatory pre-bid meeting and site visit are scheduled for June 2, 2026 at 11:00 a.m. and 1:00 p.m. respectively at 5310 Hawthorne Road, La Plata. Questions are due June 24, 2026 at 12:00 p.m. A five percent bid bond and 100% performance and labor-payment bonds are required. Bids remain valid for 120 days. Contact Dawn Brake, Senior Procurement Specialist, at braked@charlescountymd.gov or (301) 645-0566.