When Precambrian Adirondack anorthosite, Palisades diabase sill, and Devonian shale exposures are exposed by highway construction or natural erosion along I-87 through the Adirondack corridor, the Palisades Interstate Parkway, Route 97 along the Delaware River, and the Niagara Gorge, the resulting rock faces contain discontinuities — joints, bedding planes, and fracture systems — that define potential failure blocks. Without reinforcement, these blocks will eventually detach.
Access Limited installs rock bolt and anchor systems across New York using Spider Drill Rigs that access near-vertical faces where conventional drill rigs cannot operate.
Fully grouted rock bolts are passive reinforcement elements installed through the failure surface into competent rock behind it. Once grouted, they provide continuous load transfer along their entire length.
Tensioned rock anchors apply active compressive load across open joints and fracture systems — clamping the rock mass together before any movement occurs. These are engineered for large, well-defined failure blocks.
Pattern bolting installs a systematic grid of rock bolts across an entire slope face — reinforcing the overall rock mass rather than targeting individual blocks. This approach is used on highly fractured faces where discrete failure blocks cannot be individually identified.
Rock dowels are untensioned reinforcement elements grouted into the rock mass to provide shear resistance across discontinuities. They are used where passive reinforcement is sufficient and active tensioning is not required.
Access Limited's Niagara Gorge and historic bridge projects demonstrate proven New York rockfall capability.
See why NYSDOT, Thruway Authority, Palisades Interstate Park Commission, Metro-North Railroad, and hydropower operators trust Access Limited for rock bolting and anchor systems and rockfall mitigation across New York.
Access Limited delivers specialized rock bolting and anchor systems across New York's rockfall corridors. Complete the form to request an assessment or call our team directly.
