Case Study - Wet Well
Client
National Park Service, Carlsbad Caverns, NM
Project
Rehabilitation of wet wells serving restroom's 750 feet underground in caverns.
Location
Carlsbad Caverns, New Mexico
Description
Two wet wells located 750 feet underground that service the restroom's in Carlsbad Caverns. Both rectangular structures
with slanted bottoms, were experiencing deterioration problems that could lead to problems of exfiltration, contamination
and odor into surrounding caverns.
Solution
To prevent the likelihood of exfiltration into the cavern areas, the NPS chose to structurally line the wet
wells with the Poly-Triplex Liner System. The Poly-Triplex system has a non-porous membrane that is laminated
between fiberglass layers - the liner is cured in place and comes with a 10 year warranty. The non-porous membrane
would permanently eliminate any exfiltration into the surround areas. Installed in panels and cured with an inflation
canister and inflation bladder from the adjacent room above, the liner was cured in place @ 110 degrees overnight,
resulting in a monolithic and non-porous liner, tying together the walls and floor section of the structure.
Benefit
Liner stopped the deterioration and likelihood of eventual exfiltration of sewage into the surround cavern -
eliminating a potential problem that could have resulted in a horrific problem park service in this beautiful and pristine cavern.
Photos
Upper Left - Beautiful Carlsbad Cavern receives throngs of visitors each year.
Upper right - panels cut to the exact length of the wall(s)s with sloped angle at the bottom are hung.
Lower Right - Photo of the walls lined with the Poly-Triplex Liner System and the inflation bladder, prior to removal.
Comments
National Park Service is pleased to have this problem resolved without any excavation and minimal disruption of
service to the facility.
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