Any public warehouse or other public storage facility owned or otherwise controlled by the district shall be operated by persons under contracts with the district. Any contract shall reserve reasonable rentals or other charges payable to the district sufficient to pay the cost of maintaining, repairing, regulating, and operating the facilities and to pay the principal of and interest on any revenue bonds issued by the district and may contain any other conditions that may be mutually agreed upon. However, upon the breach of a contract or if no contract is in existence as to any facility, the district shall temporarily operate the facility until a contract for its operation can be negotiated.