(a) The department may repair and maintain the old causeway across Copano Bay on Highway 35 in Aransas County and the old causeway across Lavaca Bay on Highway 35 in Calhoun County as public fishing piers and recreation areas.
(b) The department and the Texas Department of Transportation may solicit and receive gifts of labor and materials for the construction and improvement of the fishing piers.
(c) The department may grant concessions to persons allowing the concessioners to charge for use of the piers and approaches.
(d) All revenue received under this section shall be deposited in the state treasury to the credit of the state parks account.