712MT OPERATOR’S MANUAL 3/25/19 Page 13 of 16
DETERMINE LOCATION OF UNDERGROUND UTILITIES
OSHA CFR 29 1926.651 requires that the estimated location of underground utilities be determined before beginning
excavation or an underground drilling operation. When the actual excavation or bore approaches an estimated utility
location, the exact location of the underground installation must be determined by a safe, acceptable and dependable
method. If any utility cannot be precisely located, the appropriate utility company must shut it off.
Call before you dig.
If you do not call, you may cause an accident; suffer injuries or death; cause interruption of
services; damage the environment; and/or incur project delays. Expect to be held liable for any damages caused, if you
fail to call.
DANGER
: Buried electric cables or gas lines can cause serious injury or death if struck with dig chain. Always
determine location of utilities before trenching.
WARNING
: Fiber optic cables convey laser light that can injure your eyesight.
CALL 811 or 1-888-258-0808 TO LOCATE UTILITIES BEFORE TRENCHING
(US. OR CANADA)
.
This free
service will provide a “One-Call” number for the geographic area that you select. Before you start any digging project,
be sure to call the local One-Call system in your area and any utility company that does not subscribe to the One-Call
system. The One-Call representative will notify participating utility companies of your proposed digging activities.
Utilities will then mark their underground facilities by using the following international marking codes:
Red
Electric
Yellow
Gas, oil, or petroleum
Orange
Communication, telephone, television
Blue
Potable water
Green/brown
Sewer
White
Proposed excavation
Pink
Surveying
For areas not represented by One-Call Systems International, contact the appropriate utility companies to locate and
mark the underground installations. Do not rely on visual evidence of underground utilities such as manhole covers or
electrical drop boxes…
CALL!
