Manholes – Case Study 4

Description

This project, completed in 2002, included 17 manholes located within the Yellowstone National Park. The manholes had significant deterioration from wastewater chemical corrosion. The structure pictured below was a rectangular vault.

Solution

Custom fabricated liner was manufactured by Poly-Triplex Industries, LLC to fit the size and shape of the box structure. Liner was saturated at the jobsite with a 2-part 100% solids epoxy resin, then positioned into the structure. Liner was then cured-in-place with air pressure and steam heat forming a monolithic liner from the ring and cover to the benches.

Benefit

The monolithic liner has formed to the rectangular shape of the structure and provides a gas impermeable barrier to further deterioration, infiltration and exfiltration, providing permanent protection to the pristine environment in this beautiful National Park.

Upper Left: Yellowstone National Park entrance
Upper Right: Yellowstone National Park geyser

Upper Left: Liner is being saturated at the jobsite with 2-part epoxy resin.
Upper Right: Poly-Triplex Liner installation is complete and structure is back in service.

Comments

This deteriorated vault was completely rehabilitated in one day with the Poly-Triplex Liner System. The entire project was completed in a timely manner. Since this installation, the National Park Service has become to rely on the Poly-Triplex System to correct problems in many other structures including manholes, pump stations and wet wells located throughout the National Park System.