To amend the Warren Act (Act of February 21, 1911, 43 U.S.C. 523 et seq) to expand the purposes for which excess storage or carrying capacity in reclamation projects may be used, and for other purposes.

Amends the Warren Act to grant users of Federal reclamation projects certain rights with respect to the delivery of excess water.

Expands the purposes for which excess storage or carrying capacity in reclamation projects may be used to include municipal, industrial, domestic, or miscellaneous purposes, including fish and wildlife purposes, as well as for irrigation purposes.

Specifies that water shall not be furnished for irrigation uses from any reservoir or canal in excess of the amount sufficient to irrigate that landowner's ownership entitlement under Federal law.