35 Ill. Adm. Code 604.1450
Surface Water Crossings
Section 604.1450 Â Surface Water Crossings
a)Â Â Â Â Â Â Â Â For
above‑water crossings, the pipe must be adequately supported and
anchored, protected from damage and freezing, and accessible for repair or
replacement.
b)Â Â Â Â Â Â Â Â Underwater
Crossings
1)Â Â Â Â Â Â Â Â A
minimum cover of five feet must be provided over the pipe.
2)Â Â Â Â Â Â Â Â When
crossing water courses that are greater than 15 feet in width, the following apply:
A)Â Â Â Â Â Â Â the
pipe must be of special construction, having flexible, restrained or welded
watertight joints;
B)Â Â Â Â Â Â Â valves
must be provided at both ends of water crossings so that the section can be
isolated for testing or repair;
C)Â Â Â Â Â Â Â the
valves must be easily accessible and not subject to flooding; and
D)Â Â Â Â Â Â Â permanent
taps or other provisions to allow insertion of a small meter to determine
leakage and obtain water samples must be made on each side of the valve closest
to the supply source.