To authorize the Secretary of the Interior to cooperate and assist in environmental and other studies and to execute and implement a contract for the design, construction, operation, and maintenance of facilities in the South Delta, California, and for other purposes.

[AI summary unavailable — showing source text] Directs the Secretary of the Interior to implement a contract for the design, construction, operation, and maintenance of facilities in the South Delta, California. Provides implementation conditions, including requirements regarding: (1) environmental studies; (2) a Delta barrier facilities testing and monitoring program; (3) interim water flow; and (4) compatibility with the nearby Old River barrier. Sets forth conditions for cost sharing under such contract among the United States, the California Department of Water Resources, and the South Delta Water Agency. Authorizes appropriations.…