New Hampshire's steep slope drilling needs concentrate in Franconia Notch and the White Mountains, where I-93's mountain pass corridor crosses granite faces NHDOT has long managed with limited equipment options given the terrain's combination of extreme grade and harsh weather-window construction constraints.
GSI's SPIDER excavator experience shapes how these situations get addressed across the state.
The compact footprint of a track-mounted rig matters most in Franconia Notch, where narrow shoulder space along I-93 leaves little room for a conventional wheeled drill to set up. GSI's Soil Nail Launcher™ capability supports this step.
No natural bench exists on many White Mountain granite faces, so GSI anchors the drilling platform to the rock itself rather than relying on a graded working surface that isn't there. This is one application of GSI's broader soil nailing expertise.
When even an anchored platform can't reach a section of exposed granite, technicians go in on rope, drilling by hand within New Hampshire's short mountain construction season. GSI's engineers experience informs this approach.
This approach is informed by GSI's broader transportation infrastructure work across New Hampshire.
Engineered for New Hampshire's conditions. GSI's New Hampshire steep slope capability is built for both Franconia Notch's extreme granite terrain and the state's compressed mountain construction season. It's backed by GSI's broader general contractors and our case studies capability.
Design/build delivery. One integrated team owns the full scope — eliminating the gaps that traditional design-bid-build creates.
NHDOT specification compliance. Design records and field practices satisfy state DOT specifications from the project's first submission.
GSI's engineers are ready to assess steep slope drilling conditions at your New Hampshire site.