The Santa Clara Valley Water District was created by an act of the California Legislature, and operates as a state of California Special District, with jurisdiction throughout Santa Clara County.
The District Act was amended in October 2009 with the passage of AB 466. The bill was an act “to amend Sections 13.2 and 20 of, to add Sections 7.4, 7.5, 7.6, 7.7, 7.8, 7.9, 7.10, 7.11, and 8 to, and to repeal and add Sections 7, 7.1, and 7.3 of, the Santa Clara Valley Water District Act (Chapter 1405 of the Statutes of 1951), relating to the Santa Clara Valley Water District.”
Complete text of the law (Chapter 443, Statutes of 2009) is available here on the Official California Legislation website.
The introductory paragraph of the original legislation reads:
"An act to create a flood control district to be called Santa Clara County Flood Control and Water District; to provide for the control and conservation of flood and storm waters and the protection of watercourses, watersheds, public highways, life and property from damage or destruction from such waters; to provide for the acquisition, retention, and reclaiming of drainage, storm, flood, and other waters and to save, conserve, and distribute such waters for beneficial use in said district; to authorize the incurring of indebtedness, the issuance and sale of bonds, and the levying and collection of taxes and assessments on property within said district and in the respective zones thereof; to define the powers of said district; to provide for the government, management, and operation of said district and for the acquisition and construction of property and works to carry out the purposes of the district, declaring the urgency thereof, to take effect immediately. The name of the Santa Clara County Flood Control and Water District Act was changed to the Santa Clara Valley Water District. "