; (B) the Western Area Power Administration; and (C) the Department of Defense in the case of the Clayton Canal diversion traversing the Concord Naval Weapons Station. (2) Contra Costa Canal (A) In general The term Contra Costa Canal means the Contra Costa Canal Unit of the Central Valley Project, which exclusively serves the Contra Costa Water District in an urban area of Contra Costa County, California. (B) Inclusions The term Contra Costa Canal includes pipelines, conduits, pumping plants, aqueducts, laterals, water storage and regulatory facilities, electric substations, related works and improvements, and all interests in land associated with the Contra Costa Canal Unit of the Central Valley Project in existence on the date of enactment of this Act. (C) Exclusion The term Contra Costa Canal does not include the Rock Slough fish screen facility. (3) Contracts The term contracts means the existing water service contract between the District and the United States, Contract No. 175r–3401A–LTR1 (2005), Contract No. 14–06–200–6072A (1972, as amended), and any other contract or land permit involving the United States, the District, and Contra Costa Canal. (4) District The term District means the Contra Costa Water District, a political subdivision of the State of California. (5) Rock Slough fish screen facility (A) In general The term Rock Slough fish screen facility means the fish screen facility at the Rock Slough intake to the Contra Costa Canal. (B) Inclusions The term Rock Slough fish screen facility includes the screen structure, rake cleaning system, and accessory structures integral to the screen function of the Rock Slough fish screen facility, as required under the Central Valley Project Improvement Act ( Public Law 102–575