Manhole Rehabilitation
Confined-Space Manhole Repair & Restoration
Manholes are critical access points for sewer and storm drain systems—but they’re also vulnerable to infiltration, corrosion, and structural degradation. TrenchFree performs manhole rehabilitation to address these issues and extend the service life of your underground infrastructure.
Our confined-space certified crews safely restore manholes using industry-approved methods, ensuring compliance with OSHA regulations and municipal standards.
Common Manhole Problems
- Infiltration — Groundwater entering through cracks, joints, or deteriorated seals
- Corrosion — Hydrogen sulfide (H2S) attack on concrete and metal components
- Structural cracking — Settlement, traffic loading, or age-related deterioration
- Inflow — Surface water entering through damaged frames, covers, or chimney seals
Rehabilitation Services
- Structural rehabilitation — Cementitious or epoxy coatings to restore structural integrity
- Infiltration mitigation — Chemical grouting, sealing, and waterproofing
- Chimney seal installation — Flexible seals to stop inflow at frame connections
- Bench and invert repair — Restoration of flow channels and benching
- Protective coatings — Corrosion-resistant linings for H2S environments
Safety & Compliance
Manhole work is inherently confined-space work. Our crews are trained and certified in:
- OSHA confined space entry procedures
- Atmospheric monitoring and ventilation
- Rescue and emergency response protocols
Why Rehabilitate vs. Replace
Manhole replacement is expensive and disruptive—often requiring traffic control, excavation, and extended service interruptions. Rehabilitation restores function at a fraction of the cost while keeping your system operational.
