Ala. Code § 22-25B-10

A certified wastewater management entity, with the approval of the governmental entities in control of the rights-of-way, may install and maintain sewer collection and effluent transport lines within public rights-of-way according to an engineered design and inspection, to comply with the Department of Transportation’s standards. The lines installation is limited to a crossing of the right-of-way and installed in proper casement and at no cost to the state, county, or municipal government.