Dickinson Dam Bascule Gates Settlement Act of 1999

Dickinson Dam Bascule Gates Settlement Act of 1999 - Authorizes the Secretary of the Interior to accept from the city of Dickinson, North Dakota, a one-time payment of $300,000 in lieu of any existing repayment obligations for construction and modification costs of the Bureau of Reclamation in placing bascule gates on the Dickinson Dam to provide additional water capacity in Lake Patterson, North Dakota, toward which amount any payments made by the city to the Secretary on or after June 2, 1998, shall be credited.

Directs the Secretary to enter into an agreement with the city allocating responsibilities for operation and maintenance costs of the gates. Makes the city responsible for up to a maximum annual amount of $15,000 of such costs. Authorizes the Secretary to enter into contracts with the city or other person to use water from the Lake.