Water Treatment Sludge Plant Reroof IFB

The City of Bismarck is accepting Single Prime Bids for the Water Treatment Sludge Plant Reroof Project. Sealed bids must be endorsed “WTP Sludge Plant Reroof Project” and may be mailed to the City Administrator (PO Box 5503, Bismarck ND 58506-5503) or delivered to the City Administrator at 221 N 5th Street, 4th Floor, Bismarck, ND 58501 until 3:00 PM CT on Thursday, October 22, 2026. Bids will be publicly opened and read aloud at 4:00 PM in the Mayor’s Conference Room, City/County Building, 4th Floor.

The Work consists of the removal and replacement of existing low-slope roofing systems, including verification and supplemental topside sealing of concrete roof deck joints. Underside deck joint sealing is furnished by the Owner under a separate agreement and is not part of this Contract. The individual roof areas and associated work are described below:

• Area A (7,814 SF) (Base Bid): Remove the existing adhered EPDM roofing and hot-mopped, multi-layer tapered polyiso insulation. Install a new roofing assembly consisting of a vapor barrier, tapered polyiso insulation, coverboard, and ballasted EPDM roofing system.
• Area B (2,786 SF) (Alternate No. 1): Remove the existing adhered EPDM roofing and one layer of mechanically fastened polyiso insulation. Install a new roofing assembly consisting of a vapor barrier, two layers of polyiso insulation installed using low-rise foam adhesive, coverboard, and adhered EPDM roofing system.
• Area C (2,437 SF) (Alternate No. 2): Remove the existing adhered EPDM roofing and one layer of hot-mopped polyiso insulation. Install a new roofing assembly consisting of a vapor barrier, two layers of polyiso insulation installed using low-rise foam adhesive, coverboard, and adhered EPDM roofing system.
• Area D (4,470 SF) (Base Bid): Remove the existing ballasted EPDM roofing and EPS insulation. Install a new roofing assembly consisting of a vapor barrier, two layers of polyiso insulation, coverboard, and ballasted EPDM roofing system.

Bid Documents prepared by The Origin Group are available for review at regional builders exchanges and online plan rooms. Electronic copies are available at no cost by calling 701-258-7077 or emailing

A pre-bid meeting will be held on-site at 615 River Road, Bismarck, ND, on Thursday, October 8, 2026, at 2:00 PM CT. Attendance is non-mandatory but highly encouraged. The Work shall be substantially complete by June 30, 2027.

Each bid shall consist of two separate sealed envelopes, each clearly marked with the contractor’s name:

• Envelope 1: Bid Security equal to five percent (5%) of the total bid, including all alternates, in the form of a bidder’s bond, executed by a surety company authorized to do business in North Dakota, in compliance with Section 48-01.2-05 of the North Dakota Century Code. This envelope must also include a copy of the contractor’s current valid North Dakota Contractor’s License or Certificate of Renewal, in compliance with N.D.C.C. Section 43-07-12.
• Envelope 2: Completed Bid Form. Bid submittals that do not comply with these instructions will not be opened or publicly read. The successful bidder will be required to furnish a Performance and Payment Bond.

Direct all questions and requests for substitutions to The Origin Group at 701-258-7077. Written requests must be received at least five (5) days prior to the bid opening. Responses will be issued by Addendum to all plan holders.

The Owner reserves the right to hold all bids for a period of sixty (60) days after the bid opening, to reject any or all bids, to waive informalities or irregularities, and to rebid the project if necessary. The project will be awarded to the lowest responsive and responsible bidder or the bid deemed most advantageous to the Owner, as determined in the Owner’s sole discretion.

IFB - Water Treatment Sludge Plant Reroof