In addition to all other powers and duties now conferred by law upon county commissions, such commissions are hereby empowered to acquire, by purchase, right of eminent domain, lease, gift, or otherwise, land for the establishment of public refuse dumps and sanitary landfills, and to operate and maintain such dumps and fills, and to pay for such land, and the operation and maintenance of such dumps and fills, in whole or in part, either out of general funds in the county treasury, or out of special funds to be derived from fees paid by users of such facilities: Provided, That the authority granted by this section expires on January 1, 1989.