Manhole: rehab systems

More than eight years ago, representatives of municipalities and consulting engineers were asking that industry neutral training be made available, particularly applicable to the inspection of pipeline rehabilitation projects.

The Lifespan System is a watertight, corrosion-proof, non-conductive, locking rubber manhole frame and lid system that prevents rain derived inflow from entering sanitary sewers through the top of the manhole.

The Lifespan System, manufactured by Hamilton Kent, is a watertight, corrosion-proof, non-conductive, locking rubber manhole frame and lid system that prevents rain derived inflow from entering sanitary sewers through the top of the manhole. And it retains the hydraulic, water-tight and structural integrity of the underlying concrete structure; thereby delivering a longer service life.

The Magnalight MMLP-1MLED Temporary Manhole Mount Light Fixture provides operators in hazardous enclosed locations with a convenient and easily deployed explosion proof lighting solution.

The Allegro Manhole Ventilation Passthru (MVP) (patent pending) is designed to maintain and re-direct airflow with minimal restrictions into manholes, sewers and tanks.

Gerhard “Gerry” P. Muenchmeyer, P.E., NASSCO Technical Director

Manholes consist of multiple components and are made of different materials, each serving a different purpose but contributing to the complete manhole structure. Each component typically has its own set of defects and deterioration mechanisms.

Gerhard “Gerry” P. Muenchmeyer, P.E. NASSCO Technical Director

Editor’s Note: This is the first of three articles focusing on the current state of manholes, manhole assessment and manhole rehabilitation. Part two will be published in the August.

Gerhard “Gerry” P. Muenchmeyer, P.E., NASSCO Technical Director

The nation’s failing sewer collection system infrastructure encompasses main pipelines, lateral sewers and manholes. There exist over 20 million manholes in the U.S. of which over four million are older than 50 years and over five million are 30 to 50 years old.

Jeff Griffin, Senior Editor

Laredo, TX, founded more than 250 years ago, on what today is on the border of the United States and Mexico, has grown to a bustling city of more than 230,000 people with another 660,000 living just across the Rio Grande River in Laredo’s sister city of Nuevo Laredo, Mexico.

The Washington Suburban Sanitary Commission seeks bidders on work including a collection of detailed repair, rehabilitation and replacement tasks within residential areas. This is the first of a series of up to six contracts the commission will publicize via its Central Bidder Registration system. Contractors wishing to submit bids or receive information on future projects should register at the commission's website, Solicitations are available from the project’s website, http://www.wsscwater.com/business/cbr/.

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