California Government Code 4216: 811 Notice, Marking, and Penalties

California Government Code 4216, often called the state’s “call before you dig” law, requires anyone excavating in California to notify 811 at least two working days before breaking ground so utility operators can locate and mark their buried lines. The statute sets out who must call, how the dig site must be marked, what to do if a line is hit, and civil penalties that reach $100,000 for the most serious violations.¹

Who Has to Follow the Law

The statute defines “excavator” broadly: any person, contractor, subcontractor, corporation, public agency, or other entity that digs with its own employees or equipment. An “operator” is anyone who owns, operates, or maintains a subsurface installation.² Both carry independent obligations, and both can be penalized.

Two narrow homeowner exemptions exist. A homeowner who hires a licensed contractor for an unpermitted project on their property is not personally subject to the law; the contractor is. A homeowner who is not a licensed contractor and digs on their own principal residence for an unpermitted home improvement is also exempt.³ Once a government-issued permit is required, the exemption disappears. Even exempt homeowners should still call 811: hitting a gas line in the backyard is dangerous whether or not the state can fine you.

Calling 811 and the Two-Day Notice

Every non-emergency excavation begins with a call or online request to 811, which routes the ticket to the appropriate regional notification center. The excavator must give notice at least two working days before digging, and the day of notification does not count toward those two days. Notice cannot be given more than 14 calendar days before the planned start.¹ A later start date can be specified at the time of notice but still cannot push past 14 calendar days, unless the project qualifies as a “continual excavation,” which extends the window to six months.²

Marking Your Dig Area in White

Before contacting the notification center, the excavator must delineate the planned dig area in white paint so operators know exactly where to look. The statute requires use of the Common Ground Alliance Best Practices; where those conflict with the statute, the statute controls.² If the site isn’t delineated, an operator may decline to mark its lines until delineation is complete.¹

White paint is the default, but flags, stakes, whiskers, or combinations are allowed when the excavator determines that white paint could be confused with traffic or pedestrian markings on streets and highways. Using an alternative method requires contacting the regional notification center so operators are informed.²

What the Operator Must Do

After receiving notice, the operator must act before the legal excavation start date. It has three choices: locate and field mark its installations within the delineated area, provide the excavator with available information about where its lines are, or advise the excavator that it has no installations in the area. Locating must be performed by a qualified person using at least a single-frequency locating device, with access to alternative verification sources.⁴

Field markings follow the APWA uniform color code: red for electric, yellow for gas, blue for water, and so on.² Where multiple installations of the same type run together, the operator marks the number present. Abandoned installations the operator knows about are marked with an “A” inside a circle. Operators are not required to indicate depth.⁴

If markings fade or get disturbed before the ticket expires, the excavator can request a remark. The operator then has two working days (not counting the request date) to remark the installation.⁴

The Tolerance Zone and the Hand-Tool Rule

Once marks are down, the excavator has to dig around them carefully. The tolerance zone extends 24 inches on each side of the operator’s field marking. Within that zone, excavators must use hand tools or non-destructive methods such as vacuum excavation to expose the utility. “Hand tool” means any excavation tool powered entirely by human effort, not by a motor, engine, or hydraulic or pneumatic device.² This is where most damage happens, and where enforcement focuses after a strike.

Extra Step Near High-Priority Lines

Some buried utilities are classified as “high-priority subsurface installations” because the consequences of hitting them are severe: natural gas pipelines operating above 60 psig, petroleum pipelines, pressurized sewage pipelines, electric lines at 60 kV or above, and hazardous materials pipelines.²

When a planned excavation falls within 10 feet of one of these, the operator must contact the excavator and arrange an onsite meeting before the legal start date, or at a mutually agreed time. At the meeting, the two sides discuss excavation methods and tools and what information the operator will provide to verify the installation’s exact location. Digging cannot begin until the meeting is complete.¹

How Long Your Ticket Lasts

A dig ticket from the regional notification center is valid for 28 days from issuance. For work continuing beyond that, the excavator has to renew by the end of the 28th day, either online or by calling 811.¹ This is one of the easier violations to commit by accident on a long-running project, so build the renewal into the schedule.

If You Hit a Line

Damage happens even when everyone follows the rules. What matters next is reporting. The obligations scale with severity:

Any damage at all, including breaks, leaks, nicks, dents, gouges, and damage to protective coatings or cathodic protection, requires immediate notice to the operator. The regional notification center can supply the operator’s contact information if needed.
Damage to a high-priority installation requires calling 911 first, then notifying the operator.
Any release of a flammable, toxic, or corrosive substance requires calling 911 immediately, then contacting the operator.

In addition to notifying the operator, the excavator must report the damage to the regional notification center within 48 hours. Skipping this is a separate violation. The only exception is for an excavator who is also the operator of the damaged line and discovered the damage during routine maintenance, provided there is no gas or hazardous liquid release.⁵

When the Two-Day Rule Doesn’t Apply

The two-working-day notice does not apply in emergencies. The statute defines an emergency as a sudden, unexpected event involving clear and imminent danger that demands immediate action to prevent or reduce harm to life, health, property, or essential public services. The law lists fires, floods, earthquakes, riots, accidents, damage to a subsurface installation that needs immediate repair, and sabotage.² The bar is high. Falling behind schedule or having a crew already on site does not qualify, and anyone invoking the exception should be ready to document the circumstances if the Dig Safe Board asks.

Penalties

The California Underground Facilities Safe Excavation Board, known as the Dig Safe Board, investigates violations and administers penalties.² Civil penalties are tiered by the violator’s mental state and the consequences:

Negligent violation: up to $10,000 per violation.⁶
Knowing and willful violation: up to $50,000 per violation.⁷
Knowing and willful violation that damages a gas or hazardous liquid pipeline and causes a release: up to $100,000 per violation.⁷

These apply to both excavators and operators. An operator that fails to mark on time faces the same framework as an excavator who dug without calling 811. The penalties are civil, not criminal, but on a project with multiple unmarked crossings they add up quickly.

Defenses When You Did Everything Right

An excavator who damages a line despite following every step has a credible defense. Showing proper notification to the regional notification center, correct delineation, respect for the tolerance zone, and use of hand tools or non-destructive methods near marked lines shifts responsibility toward the operator when its markings were inaccurate. The law emphasizes shared accountability.

Operators have their own defenses. Depth is not required information, so damage caused by a line being shallower than expected does not by itself establish a violation. And where the excavator’s delineation was inadequate or misleading, the operator’s duty to mark accurately is limited by the quality of what it received.

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California Legislative Information. California Code Government Code 4216.2
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California Legislative Information. California Code Government Code 4216
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California Legislative Information. California Government Code 4216.8
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California Legislative Information. California Code Government Code 4216.3
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California Legislative Information. California Government Code 4216.4
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California Legislative Information. California Code Government Code 4216.6
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California Legislative Information. California Government Code 4216.6