Geostabilization International, Colorado, is the only company that can stabilize a road by both drilling soil nails and shooting soil nails with compressed air into the earth. At Brook Road, the company decided that drilling the soil nails would be a safer method.
In the 1970s, a massive rockslide buried Interstate 81 in Montgomery County, VA while it was being constructed. The mountain of debris took months to clear. More recently, VDOT engineers and geologists noticed active movement near the historic slide, and proactively began an emergency rock slope mitigation effort.