CA Pub Util Code Section 100131

The district may exercise the right of eminent domain to take any property necessary or convenient to the exercise of the powers granted in this part. The district, in exercising such power, shall in addition to the damages for the taking, injury, or destruction of property, also pay the cost, exclusive of betterment and with credit for salvage value, 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 moved to a new location. No taking or acquisition by the district which would involve the abandonment, removal, relocation, or use of the property of a railroad corporation, as defined in Section 230, shall be permitted, unless the Public Utilities Commission, after a hearing, shall find and determine that the public interest and necessity require the abandonment, removal, relocation, or use of such property and that such taking or acquisition will not unreasonably impair the ability of the railroad corporation involved to provide safe, adequate, economical, and efficient service.