Request for Proposal EFMO 224159/318539, Rehabilit

The National Park Service Denver Service Center seeks rehabilitation of the Effigy Mounds Visitor Center and redesign and repaving of the visitor parking and maintenance areas, with proposals due December 7, 2026. The procurement is Firm-Fixed-Price with a magnitude exceeding $10 million and carries no set-aside.

Place of performance is Harpers Ferry, Iowa. The contract structure includes five base contract line items (CLINs 0001–0005) covering visitor center structural safety and foundation improvements, temporary trailer placement, temporary office space rental and move costs, collections relocation, and parking lot replacement, plus seven optional line items (CLINs 0006–0012) for HVAC and fire suppression upgrades, exterior envelope rehabilitation, interior accessibility compliance with plumbing and electrical improvements, low voltage conduit updates, lightning protection, meeting room and auditorium audiovisual and exhibit renovation, and deck expansion. All line items are priced as lump sum. Contractors must begin performance within zero calendar days of receiving notice to proceed and complete work within 450 calendar days. Performance and payment bonds are required within 10 calendar days of award. Liquidated damages are assessed at $1,363 per calendar day of delay.

Davis-Bacon prevailing wage rates apply under two separate wage determinations: IA20260031 for building construction in Allamakee County and IA20260028 for heavy and highway construction across 99 Iowa counties. Executive Orders 13706 (paid sick leave for contracts awarded on or after January 1, 2020) and 13658 (minimum wage $13.65 per hour effective May 11 through December 3, 2026) apply. A pre-proposal site visit is required. Proposals must include Technical Volume I (Experience Questionnaire, Key Personnel Qualifications, and Past Performance Questionnaire) and Business & Price Volume II (Bid Bond, Contract Bid Schedule, General References, and Report on Limitation on Subcontracting). Small business subcontracting is limited to 85 percent for general construction. The NAICS code is 236220, Commercial and Institutional Building Construction; PSC is Z2QA, Repair or Alteration or Restoration of Real Property.