RSA 481:8 Contracts.

I. The department, in order to make the project so far as possible self-liquidating and self-supporting, shall make contracts in the name of the department with persons or corporations as may be specially benefited by the project, including users of water in and outside the state for power or other purposes, covering the terms under which the persons or corporations shall pay for the benefits. No contract shall extend for more than 50 years from the completion of the project. The compensation for the use of stored water or other benefits created by the projects shall be made equitable as among different users. All contracts shall benefit and bind the contracting users and their successors in title to the dams, water and flowage rights, generating plants, mills, or other real estate