18.7.224 LONGITUDINAL OCCUPANCY BY NEW UNDERGROUND FACILITIES
(1) For communication and electrical power facilities,
underground facilities shall be installed according to the requirements of the
National Electrical Safety Code.
(2) For natural gas and other hydrocarbon
facilities, pipeline installation shall conform to all applicable federal
(3) For water and sewer facilities,
pipeline installation shall conform to the current standards for Montana Public
Works Standard Specifications and to the state's current Standard
for Road and Bridge Construction and all applicable federal regulations.
underground facilities will be permitted longitudinal occupancy under any
portion of the pavement or surfacing courses in rural areas. However, in
hardship cases such as solid rock, steep cliffs and swampy areas, etc., the
department may permit the placement of utility facilities along the shoulder of
the highway road section, provided sufficient justification is shown. It would
be preferable in these cases, however, if the facilities were placed in the
roadway ditch section or in the roadway fills for the short distance required
to bypass the hardship areas. In such hardship cases consideration will be
given to placement in conduit, at extra depth, or placing a concrete cap over
the facility for additional protection. The installations shall be well marked
as they leave the edge of the right-of-way and where they are
located within the highway road facility. This does not affect the direct
crossing of the highway rights-of-way in any manner (for
underground crossings, see ARM 18.7.227 through 18.7.229) . Utility installation
in curbed sections or built-up areas may be permitted under the pavement
or surfacing courses provided there are no border strips available for the
(5) Fiber optic cable is to be buried a minimum of 1.0668 meters (42 inches) below
the ground line except where the department approves a lesser depth because of
some exceptionally difficult construction problems, including, but not limited
to, solid rock or placement in utility conduits under city streets. The
installed cable must be properly marked above ground and have a location or
warning tape 457.2 millimeters (18 inches) above the cable, except as provided
for in (6) . The aboveground marking should be at least at 152.4 meters (500
foot) intervals or on a common line of sight between signs and markers.
installing non-metallic pipe or cable, the utility owner shall install
suitable markers and other metallic location tape or wire for all installations
other than pushed or bored crossings.
History: Sec. 60-3-101 and 60-4-402 MCA; IMP, Sec. 60-3-101 and 60-4-402 MCA; Eff. 12/31/72; AMD, 1995 MAR p. 1043, Eff. 5/12/95.