33 U.S.C. § 2325: Voluntary contributions for environmental and recreation projects

(a) AcceptanceIn connection with carrying out a water resources project for environmental protection and restoration or a water resources project for recreation, the Secretary is authorized to accept contributions of cash, funds, materials, and services from persons, including governmental entities but excluding the project sponsor. (b) DepositAny cash or funds received by the Secretary under subsection (a) shall be deposited into the account in the Treasury of the United States entitled “Contributions and Advances, Rivers and Harbors, Corps of Engineers (8862)” and shall be available until expended to carry out water resources projects described in subsection (a).