Section 1490 Of Chapter 6. Obstructions And Injuries To County Highways From California Streets And Highways Code >> Division 2. >> Chapter 6.

. The board of supervisors of any county may construct and maintain bridges over any ditches which are used exclusively for irrigation purposes and which cross county highways in the county. Such board may, with the consent of the owners of such ditches, declare any of such bridges to be public property, and may then maintain and repair such bridges at the expense of the county.