The board of county commissioners, or, if a joint board of county commissioners has been created under section 940.35 of the Revised Code, the joint board, shall maintain the improvements constructed under this chapter. For that purpose, the board of county commissioners or joint board may use procedures and requirements established in Chapter 6137 of the Revised Code and may contract with or authorize the board of supervisors or joint board of supervisors of a soil and water conservation district to perform maintenance of such works of improvement.