As used in the Rural Infrastructure Act:
A. "department" means the department of environment;
B. "fund" means the rural infrastructure revolving loan fund;
C. "local authority" means a mutual domestic association or water and sanitation district that supplies water, wastewater or solid waste services to, or a municipality that has, a population of less than twenty thousand or a county with a population of less than two hundred thousand;
D. "operate and maintain" means all necessary activities, including replacement of equipment or appurtenances to assure the dependable and economical function of a facility in accordance with its intended purpose;
E. "secretary" means the secretary of environment;
F. "solid waste facility" includes transfer and convenience facilities, landfills or other equipment or systems used for the processing, transformation, recycling or disposal of solid waste;
G. "wastewater facility" includes collection lines, pumping equipment, treatment works and disposal piping or process units; and
H. "water supply facility" includes the source of supply of water, pumping equipment, storage facilities, transmission lines, treatment works and distribution systems.