Cal. Sts. & High. Code § 27261

Every person, city or county or public corporation whose right of way is intersected or crossed by the works of the district shall cooperate with the board in forming such intersection or crossing, and grant the necessary rights of way therefor. The district shall pay the necessary expenses of any intersection and damages to any public corporation, city or county or abutting property owner for expenses caused by the construction of the works of the district.