Missouri Hydrovac & Excavation Regulations
Excavation laws, 811 requirements, and licensing information for Missouri.
Missouri requires excavators to contact Missouri 811 at least 2 working days before excavation. The Missouri Underground Facility Safety and Damage Prevention Act governs all excavation activities.
Hydrovac excavation is widely used in Missouri for utility and pipeline work, particularly in the St. Louis and Kansas City metro areas. The state supports non-destructive excavation as a preferred method near marked facilities.
Call Before You Dig: Missouri 811
Phone: 811 | Notice Required: 2 working days
Visit Missouri 811 WebsiteTolerance Zone
Reasonable care and hand excavation required within 24 inches of marked utility facilities.
Key Regulations
Underground Facility Safety and Damage Prevention Act
Establishes notification requirements and excavation safety standards.
RSMo 319.010 through 319.050
White-Lining Requirement
Excavators should pre-mark the proposed excavation area in white paint or flags.
Damage Reporting
All damages must be reported immediately to the facility owner and emergency services if hazardous.
Penalties for Violations
Violations of Missouri excavation laws carry penalties.
Maximum Fine: $10,000
- ●Class A misdemeanor for knowing violations
- ●Liability for all damages and service disruptions
Licensing Requirements
- Missouri contractor registration or license as applicable
- Municipal business license and permits
- General liability and workers compensation insurance
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