The department may contribute funds to the United States and expend funds appropriated or otherwise available to provide all lands, easements, and rights of way for bank revetment for the protection of levees above Cache Slough and the levee reconstruction, including the costs of all alterations to highways, road crossings, and drainage and irrigation facilities incident to the work and the State’s contribution of one-third of the costs of bank revetment and levee construction, as provided for and required under the provisions of the Act of Congress, Public No. 392, Seventy-fifth Congress, approved August 26, 1937.