Whenever there shall be located within any such county, any United States military post, reservation or station, or any naval station, or other federal enclave, the county board is authorized to enter into contracts or agreements with the appropriate authorities of the United States, permitting either party to the contract to connect with and use any conduits, channels, pipes or facilities, and to use any other structures or work installed by the other party to the contract.
55 ILCS 5/5-15012