37.111.206 LAYOUT PLAN: WATER SUPPLY REQUIREMENTS
(1) (a) A person that submits a layout plan under ARM 37.111.205 must obtain department approval of plans and specifications that meet the requirements of this rule. Approval under this subchapter does not remove the need to obtain other approvals that may be required under other state, local, or federal laws (including compliance with the Americans with Disabilities Act, Public Law 101-336) .
(b) If an existing public water supply of satisfactory quantity and pressure is available, and the owner of the public water system agrees to provide service, connection must be made to the public water system and its supply used exclusively except for non-potable water uses approved by the department in writing. If a satisfactory existing public water supply is not available, a private or public water supply system for potable water uses must be developed and used as approved by the department.
(c) All general services and limited services campground spaces for tents or dependent trailers must either be directly served by a water supply, within 300 feet of a common water station, or otherwise have a water supply approved by the department under (2) of this rule. A water station consists of at least a water hydrant and the necessary appurtenances, and must be protected against backflow, back siphonage, and hose contamination. A water station must be separately located from the sanitary station to ensure that the water station hose is not used to flush sewage from the sewage holding tank.
(d) If facilities for individual water service connections are provided, the following requirements apply:
(i) A water riser provided for individual water service connections must be located and constructed to minimize potential for damage from parking of trailers. Protection may consist of posts, fences, or other permanent barriers.
(ii) A water riser for a campground must extend at least 24 inches above ground elevation, and a water riser for a manufactured home court must extend at least 4 inches above ground elevation. Surface water must be directed away from the riser, and the pipe size must be at least 3/4 of an inch.
(iii) Adequate provisions must be made to prevent freezing of service lines, valves and water risers.
(iv) A backflow prevention device must be installed for each water riser in the water service line at or near the outlet.
(v) A stop-and-waste valve and cock must be installed at the base of a water riser at least 6 feet below the ground surface unless otherwise approved by the department in writing.
(vi) There must be at least 10 feet horizontal distance between a sewer line connection and a stop-and-waste valve.
(vii) Valves must be provided for the outlet of each water service connection.
(e) A water service lateral must be constructed as follows:
(i) Pipe used for a water service lateral must be copper, 160 psi-rated plastic approved for potable water supply use under the state plumbing requirements described in ARM 24.301.301(1) , or an equivalent approved by the department.
(ii) Inside pipe diameter must be a minimum of 3/4-inch.
(iii) A water service lateral must be laid at least 10 feet horizontally from any existing or proposed sewer line or in a manner allowed under the state plumbing requirements described in ARM 24.301.301(1) .
(iv) A water service lateral crossing a sewer line must be laid to provide a minimum vertical distance of 18 inches between the bottom of the water service lateral and the top of the sewer line or in a manner allowed under the state plumbing requirements described in ARM 24.301.301(1) .
(2) The department, upon consultation with the local health authority, may allow a deviation from a specific requirement of (1) (c) through (e) above for a general services campground and may allow a deviation from a specific requirement of (1) (b) through (e) above for a limited services campground, including the requirement that a limited services campground must have a potable water supply, upon demonstration by the applicant to the department that the deviation does not have the potential to cause adverse public health effects. To be eligible for a deviation from the requirement that a limited services campground have a potable water supply, the applicant must submit to the department a plan that describes measures which will ensure that:
(a) the public is informed of the absence of a potable water supply at the campground; and
(b) the public is warned that existing water in the area of the campground is not suitable for drinking or other uses that may adversely affect public health.
(3) Upon department approval of plans and specifications, the water supply for the campground or trailer court, as applicable, must be constructed as designed in the plans and specifications.
(4) Upon installation of a water supply system approved under this rule, the system must be tested for pressure and leakage using procedures and requirements set forth in American Water Works Association American National Standard C600-87 (June 14, 1987 Approval) .
(5) Extension, alteration, repair, or replacement of a water supply system or development of a new water supply system must meet the requirements of ARM 17.36.301 through 17.36.305 and, if the system is a public water supply system, ARM 16.20.405, 17.38.101 and 17.38.105.
(6) The department hereby adopts and incorporates by reference the provisions of ARM 17.36.301 through 17.36.305, which describe subdivision review requirements for water systems; ARM 16.20.405, 17.38.101 and 17.38.105, stating requirements for public water and sewer plans, cross connections, and drilling of water wells; the state plumbing requirements described in ARM 24.301.301(1) , which describes comprehensive requirements for laying of pipes and standards for pipe used to supply potable water; and American Water Works Association American National Standard C600-87 (June 14, 1987 Approval) , which describes requirements for installation of water mains. Copies of ARM 17.36.301 through 17.36.305, 16.20.405, 17.38.101, 17.38.105 and 24.301.301(1) , and American Water Works Association National Standard C600-87 may be obtained from the Department of Public Health and Human Services, Health Policy and Services Division, Food and Consumer Safety Section, 1400 Broadway, P.O. Box 202951, Helena, Montana 59620-2951.