The US Army Corps of Engineers, Baltimore District plans to award a single-award IDIQ contract for Chelated Copper Algaecide to support the Washington Aqueduct Division in Washington, D.C. The contract is 100% set-aside for Small Businesses under NAICS 325180. The anticipated performance period is three years, with all services to be performed at the Dalecarlia and McMillan Water Treatment Plants in Washington, D.C. The Government is exploring the use of a reverse auction for this procurement. The solicitation will be provided electronically and free of charge via Unison Marketplace.