36.21.666 ARTIFICIAL GRAVEL PACKED WELLS - GENERAL
(1) In gravel packed wells, the gravel mixture shall be placed around the screen so
that bridging or size separation will not occur. The gravel pack shall be
clean, chemically stable, and composed of reasonably uniform grains. All gravel
and water used shall be disinfected in at least 50 ppm chlorine.
(2) Gravel packing shall be placed from the bottom of the screen upwards to 2 to 3
feet above the screen.
History: 37-43-202(3), MCA; IMP, 37-43-202(3), MCA; NEW, 1986 MAR p. 1699, Eff. 10/17/86.