California Code, Water Code - WAT § 71694

A district may exercise the right of eminent domain to take any property necessary to carry out any powers of the district.The district, in exercising such right, shall, in addition to the damage for the taking, injury, or destruction of property, also pay the cost of removal, reconstruction, or relocation of any structure, railways, mains, pipes, conduits, wires, cables, or poles of any public utility which is required to be removed to a new location.

A district shall not exercise the right of eminent domain, under this section, for the condemnation of property outside the boundaries of the district for any purpose, unless it first obtains the consent thereto of the board of supervisors of the county in which such property is located; provided, however, that a district may exercise the right of eminent domain, under this section, for the condemnation of property outside the boundaries of the district for the acquisition of rights-of-way in any county in which territory of the district is located or in any county adjacent to such county without obtaining the consent of the board of supervisors thereof.

When a district proposes to exercise the power of eminent domain, under this section, for the condemnation of property outside the boundaries of the district for the acquisition of rights-of-way in any county in which territory of the district is located or in any county adjacent to such county, it shall give written notice, at least two weeks prior to condemning the property, to the board of supervisors of the county in which the property is located. Such written notice shall contain a description of the property to be condemned.