1. (1) Each water corporation shall maintain accurate, to scale, up-to-date maps which shall show the service territory.
2. (2) Each water corporation shall also maintain accurate, to scale, up-to-date supply diagrams and distribution maps which shall, at a minimum, include the relative locations and capacities of major sources of supply and production facilities, pumping stations, treatment plants, storage facilities, and transmission and distribution mains. The water corporation shall retain such maps and other information, as necessary, to enable it to promptly and accurately identify the location of mains, services, valves, hydrants and blow-offs.

3. (3) Records shall be kept for each valve, hydrant and service connection. Records for valves and service connections (including curbstops) will include the size and location while records for hydrants will include the size, location, manufacturer and identification number.

   (b) Monitoring requirements.

   A map or maps showing the location of sources, storage, pump stations and the principal transmission and distribution mains within the service territory shall be submitted to the department as soon as possible but no later than one year after the effective date of these standards. Maps showing additions and significant changes thereto in each calendar year shall be submitted by March 31st of each succeeding year. If there are no changes in such calendar year, the water corporation shall simply notify the department in writing of this fact. Because of the necessity of such maps, any water corporation not possessing same shall begin an immediate program to prepare and file them. In the event such maps cannot be filed within the above-stated period, the water corporation shall request department approval for additional time to submit the maps. This request must be made within three months of the effective date of these standards.

(a) Maps and records.