Lock and Dam 10, Island Building Project, Phase 3

The U.S. Army Corps of Engineers, St. Paul District, is procuring construction services for the Lock and Dam 10, Island Building Project, Phase 3, a dredging and island restoration initiative on the Mississippi River near Guttenberg, Iowa. The project involves construction of various-sized islands within the river using granular fill from main-channel and access dredging as the base, topped with fine fill material from habitat dredging, and stabilized with native plantings and rock structures including groins, vanes, and stand-alone rock features. Key contract requirements include obtaining granular material first from access dredging, then main-channel dredging, and finally the McMillan Island Dredge Disposal Area; maintaining specified material gradations with granular fill containing maximum 10 percent material passing the No. 200 sieve and fine fill containing minimum 60 percent passing the same sieve; and compliance with Iowa Section 401 Water Quality Certification standards limiting total suspended solids to 200 mg/l at discharge points. The original proposal deadline of April 9, 2026, was extended to April 14, 2026, via Amendment 0001, which also modified sourcing priorities for dredging material and clarified compaction requirements for material placed above water surface. Award evaluation criteria are not explicitly detailed in the provided documents, though the bid abstract indicates multiple line items for construction services across defined work areas.

This procurement is designated as a Total Small Business set-aside, restricting competition to qualified small business concerns. The bid opening occurred on April 14, 2026, at 2:00 p.m., with six bidders submitting proposals; base bid amounts ranged from approximately $3.4 million to $6.2 million, while combined base and option bids ranged from approximately $5.6 million to $9.3 million. The base contract scope includes approximately 10,800 to 12,225 cubic yards of fill materials, 13,100 to 13,600 tons of riprap, and turf establishment on 4.25 acres, while Option 1 adds substantially more work with approximately 19,360 cubic yards of additional fill, 13,775 tons of riprap, willow installation of 1,050 units, and mussel and mudpuppy habitat creation. The work will be performed in Guttenberg, Iowa, with dredging material sourced from designated channel borrow areas including Catfish Slough, Hovie Island, Upper Approach to Lock and Dam 10, and McMillan Island, with final dredging quantities and priorities to be determined by the government at time of performance.