Homeowner Information
All Minnesota excavators—homeowners, farmers, and other non-professionals — are responsible for notifying GSOC of their proposed excavations.
Whether the project is large or small, if you are using machine-powered equipment or just a shovel and rake to plant a garden, contacting GSOC in advance helps everyone dig safely while avoiding costly damage to underground facilities.
APWA Uniform Color Code
Facility operators are required to mark all underground utility lines with standard color codes as established by the American Public Works Association (APWA).
WHITE
Area of Proposed Excavation
ORANGE
Communication, CATV, Fiber
RED
Electric
PURPLE
Reclaimed Water, Irrigation
PINK
Temporary Survey Markings
BLUE
Water
YELLOW
Gas, Oil, Steam, Propane
GREEN
Sewer
Before you Click or Call
Before you click or call 811, prepare specific project information needed to correctly process your ticket.
Failing to provide this information may result in a suspension of your request until you obtain that information.
For a complete view of the GSOC process from start to finish, read the Dig Safe Guide.
Planning For Your Excavation
What Does NOT Get Marked
Some underground lines in your work area may not be owned by a public facility operator. These are considered private facilities and will NOT be marked by public utility companies.
Types of private facilities include, but are not limited to, heating systems for pools, electricity for outbuildings, invisible fences, fiber optic lines, septic systems, and satellite dishes.
If you think you may have private facilities, you should contact a private utility locator to identify and locate them. For more information about private underground facilities and homeowner responsibilities please read through our GSOC Handbook.
White Markings
Excavators are required to use white markings, with no exceptions, to define the entire area of excavation. Be sure to include a safety buffer when marking the area.
- Black marks may be used during winter conditions.
- In 2026, excavators will have the option to provide electronic white markings if it provides the same information as a physical white mark.
