
How do you protect a fragile meadow from the steel cleats of a 20-ton excavator? This spring Latah SWCD was faced with this question during the Corral Creek Steelhead Habitat Restoration Project. Trish Heekin, Resource Conservation Planner and project lead, needed to build several structures to control the flow of the creek during spring runoff. The work involved hauling rock and topsoil and building ditch plugs using an excavator and dump truck.

The heavy equipment would have to cross a meadow covered with wildflowers, sedges and shrubs. Trish needed to minimize the damage to the meadow. If the top soil was disturbed weeds would move in, resulting in years of costly meadow restoration. Something needed to be placed on top of the meadow that could handle the weight of the equipment and still be light enough for a crew to move by hand.

One idea was to use 4x8 foot sheets of ¾ inch plywood. After talking with some heavy equipment operators we learned that plywood did not hold up very well. It was time to consult the Internet. A Google search turned up Ground Protection Mats. Several vendors offer 4x8 foot sheets of durable plastic designed for this type of project. White mats are available to help keep the ground underneath cool.

To date, several structures have been built at Corral Creek using the Ground Protection Mats. The meadow was protected and the mats survived intact, ready for our next project.