Trenchless

Manhole Rehabilitation

Skip Replacements: Rebuild, Protect & Prolong

A large percentage of utility manholes have been in service for more than 50 years. They are exposed to overhead traffic, freeze/ frost cycles, road salts and H2S attack. As concrete breaks down, it cracks and crumbles, allowing for infiltration into the wastewater system. When mortar weakens, bricks and blocks become loose and fall out, leaving the structure weak. Michels experienced crews can rebuild, protect and prolong the life of structures, saving the inconvenience and expense of complete replacement.

Cement Mortar Linings Micro-Silicate Mortars (MSM) are Portland-based concretes infused with micro-fiberglass rods to provide a compressive strength of 10,000 psi.

Calcium Aluminate Mortars (CAM) are infused with aluminum dust to provide additional protection against H2S. CAMs are preferred in sanitary systems and can provide compressive strengths up to 10,000 psi.

100% Solid Epoxy Linings are designed for broad range chemical resistance with the ability to bond to concretes, steel fiberglass and other surfaces. They offer superior protection in high H2S atmospheres and withstand temperature ranges of 150 to 200 degrees.

Geopolymer Mortar Linings differ from other mortars as polymerization occurs at the molecular level to create a cross-linked chain matrix throughout the lining structure. This process gives geopolymer (a manufactured rock), a compressive strength of 8,000 psi and flexural strength of 1,500 psi/10.3 MPa. It provides a higher protection against H2S and sulfuric acid.

Effective & Efficient Solutions:

• Certified installers alleviate Inflow and Infiltration, repair H2S corrosion, and restore structural integrity
• Complete work performed quickly to minimize disruption to motor and pedestrian traffic

Additional Utility Manhole Rehabilitation Capabilities:

• Spray-applied chimney seals
• Manhole grouting
• Bench and invert replacement
• Pipe invert sealing
• Step removal/replacement
• Frame and cover raising/replacement
• Anti-microbial protection

Related Services:

•Infiltration and inflow (I/I) control
• Bypass pumping
• Geopolymer mortar
• Geospatial system inspections

Projects

Michels installs a 39-inch cured-in-place pipe (CIPP) liner to rehabilitate a sewer line.

Manhole Rehabilitation

1-MN-341 Interceptor Rehabilitation

Minnesota

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1-MN-341 Interceptor Rehabilitation

Michels was the prime contractor for the reconstruction of King Court and construction of Beechtree Lane.

Manhole Rehabilitation

Beechtree Lane/ King Court

Wisconsin

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Beechtree Lane/ King Court

Michels utilized ultraviolet light (UV) cured-in-place (CIPP) pipe liners to rehabilitate nearly 45,000 linear feet of sanitary sewer pipes and 138 manholes in Guam, making it among the largest UV projects in the United States.

Manhole Rehabilitation

Northern Interceptor Sewer Rehab

Guam

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Northern Interceptor Sewer Rehab

Michels performed a CIPP lining project for the Metropolitan Council in Minnesota. The project included the rehabilitation of 3,850 LF of 96" pipe, 144 LF of 72" pipe, and reconstruction of manholes.

Manhole Rehabilitation

North Area Interceptor Phase 9

Minnesota

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North Area Interceptor Phase 9

Michels restored more than a mile of sanitary sewer pipes on the St. Paul Interceptor.

Manhole Rehabilitation

St. Paul Interceptor

Minnesota

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St. Paul Interceptor

Michels performed the removal and disposal of the existing Coal Tar Enamel (CTE) lining from approximately 18,000 feet (13 segments ranging from 900 feet to 1,600 feet in lengths) of 36-inch diameter pipe.

Manhole Rehabilitation

Orange County Feeder Relining Reach 2

California

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Orange County Feeder Relining Reach 2

Individual commitment to a group effort - that is what makes a team work, a company work, a society work, a civilization work.

Vince Lombardi

Great teamwork can do great things.

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