Semi-arid climate subject to high winds and intense rainstorm events and landfill side slopes
It was not possible to maintain a traditional vegetative cover and the reclaimed concrete material (RCM)) cover was requiring more frequent and costly maintenance
Sparse vegetation and severe weather events resulted in costly maintenance costs to address erosion rills, slumps and washouts around stormwater infrastructure
Client wanted to reduce OM&M costs while minimizing CAPEX investment for a new cover of this 20 plus acre landfill
Traditional covers are highly reliant on trucking and placing soils, heavy civil construction and on-going maintenance and repairs in order to maintain cover integrity
Results:
Worked with Owner/Owners Engineer to develop the strategy, design and build an engineered composite cover using the ClosureTurf® product from Watershed Geo
ClosureTurf® is an EPA, Subtitle D/CCR Rule compliant alternative landfill closure solution specifically designed to solve soil erosion, slope integrity, installation and maintenance cost control, CCR Rule compliance and longevity of the structure and appearance
ClosureTurf® is a patented, three-part component system comprised of a structured geomembrane, an engineered synthetic turf and processed angular sand infill
ClosureTurf® provides an impermeable geomembrane that is textured to self-anchor to the subgrade layer which can be fly ash
LWR completed clearing, grubbing and grading of the existing 20 plus acre landfill in preparation of the ClosureTurf® cover system
LWR worked with a specialty subcontractor to install the geomembrane and geosynthetic turf, both were field welded by technicians certified by the manufacturer
Benefits:
The tan colored ClosureTurf® product which is aesthetically pleasing as it blends seamlessly with the surrounding native landscape
The ClosureTurf® installation was fast and cost-effective and will significantly reduce maintenances costs for the Owner
ClosureTurf® has been tested to withstand winds of up to 120 mph and rain events of up to 6 inches per hour
Eliminated the need for costly soil and vegetative cover
Eliminated cap infiltration to waste
Eliminated soil and RCM loss, the need for borrow sources and siltation ponds
Provides enhanced visual inspection because the synthetic materials are not covered with thick soil profiles or vegetation
Reduces the Green House Gas emissions related to landfill cover construction by 80 percent
Reduced cover maintenance costs by more than 95 percent
