The solicitation number is W912HN-12-T-0028, and the solicitation is issued as a Request for Quote (RFQ). The NAICS code is 424460. This solicitation document incorporates provisions and clauses in effect through Federal Acquisition Circular 2005-59
Description of Requirement: The Wilmington District of the US Army Corps of Engineers requests the procurement and delivery of oyster shells that have been shucked and air dried in accordance with the attached specifications.
I'm not entirely sure what this is for, but I think it's part of this effort to rebuild the oyster population in the Chesapeake Bay area.