33 U.S.C. § 561 : US Code - Section 561: Advances by private parties; repayment

Search 33 U.S.C. § 561 : US Code - Section 561: Advances by private parties; repayment

Whenever local interests shall offer to advance funds for the
prosecution of a work of river and harbor improvement duly adopted
and authorized by law the Secretary of the Army may, in his
discretion, receive such funds and expend the same in the immediate
prosecution of such work. The Secretary of the Army is authorized
and directed to repay without interest, from appropriations which
may be provided by Congress for river and harbor improvements, the
moneys so contributed and expended: Provided, That no repayment of
funds which may be contributed for the purpose of meeting any
conditions of local cooperation imposed by Congress, nor under the
authority of section 560 of this title shall be made.