Mount Holly Pump Station - Slope & Geomembrane Protection

Over 150,000 square feet of 4" EnviroGrid was used within the Mount

Holly Pump Station Construction Site, which is part of a large-scale

project by Charlotte Water. The project aims to streamline wastewater

treatment services by replacing two aging municipal wastewater

treatment plants with two brand new pumping stations, one of which

being Mount Holly Pump Station. This new station will transport water

from two cities to the new Stowe facility, providing more localized

wastewater treatment services for Charlotte Water customers. The new

state-of-the-art facility will have the capacity to process over 15 million

gallons of wastewater per day.

The EGA 30 EnviroGrid® product was selected to provide slope stability

and geomembrane protection within the construction of the catch basin

ponds. After grading and compacting the subgrade on the slopes and

bottom of the storm flow basin, a drainage geocomposite was installed

directly atop the prepared surface. A layer of geomembrane liner was

then placed over the geocomposite before expanding the panels down

the slope. With the sides of the pond reaching a two to one incline, the

system was reinforced using high-strength tendon strapping, spaced at 5

tendons per panel and tied off directly to the cell wall, then to a PVC

pipe at the top of the slope to anchor the system.

The system was filled with 4 inches of concrete fill throughout the

sloped basin ponds. The continuity of this geocell system is highlighted

within this project, as it provides reinforcement to one of the pump

stations that will serve eastern Gaston County for years to come.

Geo Products is proud to have had EnviroGrid play a crucial role to create a lasting impact in the Stowe Regional Water Resource Recovery Facility project.

CS Mt. Holly Pump Station.pdf.pdf

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