Knri replace VC sanitary plumbing/septic

The Department of the Interior National Park Service Midwest Region seeks construction services to replace a septic system at Knife River Historic Indian Village in Stanton, North Dakota, with bids due July 7, 2026 at 1:00 PM Mountain Time. The procurement is an Indian Small Business Economic Enterprise set-aside, available only to certified Indian-owned small businesses.

Work must commence within 10 calendar days of receiving the Notice to Proceed and be completed within 120 calendar days. A mandatory site visit occurred May 26, 2026; offerors must acknowledge receipt of all three amendments (issued May 15, June 4, and June 11) prior to bid submission. The NAICS code is 237110, Water and Sewer Line and Related Structures Construction; PSC is Z1ND.

Distinctive requirements include removal and replacement of existing acoustic ceiling tiles; working around existing ethernet cables, fire alarm systems, water systems, and radon mitigation; and pump station motors certified explosion-proof for Class 1 Division 1 locations per specification 333213. Two 1500-gallon septic tanks in series are acceptable alternatives to a single 3000-gallon tank, or tanks may be cast in place. The contractor must submit a baseline construction schedule at least 3 days prior to the pre-construction conference and provide factory representative-led lift station training of up to 8 hours. Bids must include SF 1442 completion (blocks 14–20), a 20% bid bond, detailed price breakdown as a lump sum in block 17, original signatures, completed Limitation of Subcontracting worksheet, and acknowledgment of all amendments. Davis-Bacon wage requirements apply. Submittals require 15-day response cycles; RFI responses take 7 business days. Contact contract specialist Joseph Kirk at joseph_kirk@ios.doi.gov or 605.574.0510.