Idaho Administrative Code
Title IDAPA 58 - Environmental Quality, Department of
Rule 58.01.08 - IDAHO RULES FOR PUBLIC DRINKING WATER SYSTEMS
Section 58.01.08.546 - FACILITY AND DESIGN STANDARDS: DISTRIBUTION SYSTEM STORAGE FACILITIES
Current through August 31, 2023
01. Design. The applicable design standards of Section 544 shall be followed for distribution system storage. (3-24-22)
02. Isolation. Finished water storage structures which provide pressure directly to the distribution system shall be designed so they can be isolated from the distribution system and drained for cleaning or maintenance without causing a loss of pressure in the distribution system. This requirement may be met through available temporary tanks, redundant pumping capabilities, or other temporary means approved by the Department. If the finished water storage structure provides fire flow for the water system, the water system owner shall provide the local fire authority advance notification of cleaning or maintenance events which isolate the structure from the distribution system and reduce available fire flow to less than the minimum required by the local fire authority. (3-24-22)
03. Drain. Drains shall discharge to daylight in a way that will preclude the possibility of backflow to the reservoir and, where practical, be provided with an expanded metal screen installed within the pipe that will exclude rodents and deter vandalism. The drain shall, when practical, discharge at an elevation between twelve (12) and twenty-four (24) inches above the receiving surface, and discharge over a drainage inlet structure or a splash plate. (3-24-22)
04. Level Controls. Adequate controls shall be provided to maintain levels in distribution system storage structures. Level indicating devices shall be provided at a central location. (3-24-22)
