MIL-HDBK-1025/10
sure that location marks for all facilities are present. Provide a color chart listing each utility with
a different color if necessary to ensure all facilities have been located. Have color charts in the
hands of all excavators to ensure all known facilities have been shown.
a. If a "high priority" facility is in the excavation area, make sure the locator is on site. If
not, consult the color chart for the facility contact numbers and call the facility company and
document the response.
b. Account for all utility connections to houses or buildings before you excavate. You
should be able to see them above ground or marked on the ground.
c. Identify or locate all private facilities that have not already been located. This includes
propane and private lines, sprinklers, and other such lines. Look for sewer vents on the roof of
the house, look for sprinkler heads, turn on the system if necessary. Look for physical evidence
that facilities have not been located.
d. Sketch the location and document the depth of all public and private facilities on your
work order for future reference. If no sketch exists of all other facilities, draw a sketch of marks
with measurements of fixed objects if possible for future reference.
e. Expose all facilities that you will be crossing. When possible, all major facilities (that
is, high pressure gas, fiber optic, medium voltage electric, major pipe and water lines) should be
exposed every 30 meters (100 feet) if parallel within 1.5 meters (5 feet) of the excavation area.
f. If there are no utility locations, if marks are incomplete, or if exposing indicates utility
locations are not accurate, DO NOT DIG. Contact the facility owner to complete the utility
location.
g. Once you have verified the location of all lines and you have completed the Job Check
List, you can begin to excavate. Remember to document the sketch of your excavation site
before you start excavating.
Excavating in Areas of Utility Locations
8.4.5
WARNING
Carefully follow all shoring and safety standards, including support of
exposed underground facilities.
a. Hand dig within 1.5 meters (5 feet) of any pedestal, closure, riser guard, pole (with
riser), meter, or other structure. Hand dig within 0.6 meters (2 feet) of any and all other utility
location marks.
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