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Concrete Cloth Erosion Control
Concrete Cloth Erosion Control
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Concrete Cloth Slope Protection

Money Metals Mine, Prescott National Forest
Concrete Cloth™: Mine Slope Protection

Project Overview

In December of 2015, the US Forest Service determined that a mine located
in Prescott National Forest required maintenance due to the potential of
environmental issues. Mining operations typically create an excess of
heavy metals and other materials within the remains of the excavated soils
(tailings) and are stockpiled on-site. Tailings and other waste rock left
exposed by mining can potentially begin to spread by wind, precipitation,
runoff water or wildlife, causing environmental concerns to the surrounding
areas. In order to reduce the potential risk to human and ecological
receptors from the heavy metals, the US Forest Service went into action to
protect the surrounding area. The location was very difficult to access due
to the size of the access road. The access road was 0.4 miles and had two
switchbacks with only 13 feet or less radii.

Solution

The US Forest Service selected the best still available on cost, performance,
maintenance and aesthetics: Concrete Cloth GCCM. The area was graded
for positive drainage and long-term soil stability before installation of the
Concrete Cloth GCCM. The material was then brought down the access
road via excavator and a water truck was parked on an adjacent hilltop
so the Concrete Cloth GCCM could be hydrated. The team then began to
unroll the material overlapping it with a 4” seam working up the slope like
roofing shingles. After the material had been deployed, it was then secured
with 7” nails and washers on the top side of each panel, with the upper
panels covering the nails to minimize uplift if soil heaves in the winter.
Once the layers were secured, the team initiated the hydration phase of the
installation. The entire process took only two weeks.

Download the complete PDF here.

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