In Reclamation Dist. No. 684 v. Department of Industrial Relations (2005) 125 Cal.App.4th 1000, the court found that placement of fill on a levee (maintenance work) was subject to prevailing wage requirements. Section 1771 requires payment of prevailing wages on public works, and expressly applies to contracts for maintenance work. Section 1720, subdivision (a)(2) exempts the operations of an irrigation or reclamation district from the definition of "public work." But the work performed in Reclamation District was periodic maintenance. Such work was not related to the operation of an irrigation or drainage system of an irrigation or reclamation district, the only sort of work exempt under subdivision (a)(2). (Reclamation District, at pp. 1005-1006.)