New Hampshire Hydrovac & Excavation Regulations
Excavation laws, 811 requirements, and licensing information for New Hampshire.
New Hampshire requires all excavators to contact Dig Safe at least 72 hours before beginning excavation work. The state participates in the regional Dig Safe program covering New England states.
Hydrovac excavation is beneficial in New Hampshire due to granite bedrock, rocky soils, and challenging winter conditions. The state supports non-destructive excavation for safe utility work.
Tolerance Zone
Hand digging or non-destructive methods required within 18 inches of marked facilities.
Key Regulations
Underground Utility Damage Prevention System
Establishes notification requirements and safe excavation standards.
RSA 374:48 through 374:56
Dig Safe Participation
New Hampshire participates in the regional Dig Safe System covering multiple New England states.
Emergency Provisions
Emergency excavation may proceed with concurrent notification to the one-call center.
Penalties for Violations
Penalties for failing to comply with notification or safe digging requirements.
Maximum Fine: $5,000
- ●Civil liability for all damages and repair costs
- ●Potential criminal prosecution for willful violations
Licensing Requirements
- New Hampshire contractor licensing as required by project type
- Municipal permits for excavation
- Adequate liability insurance coverage
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