Attachment_C_GPMs.docx

Attachment C Ground Protection Mats

Ground Protection Mats (GPMs) are used in meadow restoration and repair projects to prevent heavy equipment from damaging high-value vegetation and minimize compaction. They are most effective in cases where the traffic volume will be moderately small (e.g. fewer than 50 dump truck trips). The mats are made of polyethylene plastic and are 4 feet wide by 8 feet long (Figure 1). Each mat weighs about 85 pounds.

Figure 1. GPMs in use. Note t-handles in foreground.

Each GPM has holes in every corner and along each long and short side. If GPMs are needed for multiple trips, they can be cleated together as shown in Figure 2 to provide greater stability and to keep them in place. Mats can be moved easily with two people either by carrying or pulling using hooked t-handles made for this purpose. Some hooks can be seen in the foreground in Figure 1. They can also be moved using a tractor or excavator. CONTRACTOR SHALL BE RESPONSIBLE FOR REPLACEMENT OF MATS DAMAGED DURING TRANSPORT.

For the Upper Corral Creek Restoration Project all GPMs, connecting cleats, and t-handles will be provided by Latah Soil and Water Conservation District for the Contractor’s use as specified.

Figure 2. GPMs with connecting cleats.

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