This opportunity is for a Firm-Fixed Price IDIQ contract to provide Dive Support Services at Olmsted Lock and Dam in Olmsted, Illinois. The base performance period runs from January 1, 2027 through December 31, 2027, with four one-year option periods extending through December 31, 2031. The contractor will handle all planning, management, supervision, and related services necessary to meet contract requirements and applicable regulations. One award will be made based on the lowest price. Large businesses must submit a small business subcontracting plan with their quote.