When a geotechnical scope requires drilling on grades exceeding 35 degrees, your drilling sub either has the equipment to reach the work zone safely or your schedule waits while they build temporary access roads or platforms — adding weeks, terrain disturbance, and permit coordination to a scope that should be straightforward.
GeoStabilization International deploys spider excavators rated for 80-degree slopes and purpose-built limited-access drill rigs designed specifically for steep terrain. Our crews drill soil nails, rock anchors, drain holes, and micropiles on slopes that exclude all other equipment configurations — the access problem driving contingency pricing on your bid is one we've already solved.
GeoStabilization International serves as the steep slope drilling specialty subcontractor on projects where terrain access eliminates conventional equipment. Our spider excavators and purpose-built limited-access rigs cover grades and geometries that no other drilling sub can reach.
Our fleet of spider excavators provides drilling and material handling on grades up to 80 degrees without requiring a support structure or temporary access road. Each spider is equipped with a hydraulic drill mast capable of installing soil nails, rock bolts, and drain holes.
Purpose-built limited-access drill rigs reach terrain that excludes both conventional rigs and spider excavators — narrow ledges, confined rock faces, and approach geometries that standard access methods cannot navigate.
On vertical and overhanging faces where no mechanical equipment can work, SPRAT-certified rope access personnel provide drill positioning, anchor installation, and material handling. Our crews hold current Level 1 and Level 2 certifications and work within OSHA fall protection plans on every scope.
Complex scopes combining soil nail installation, horizontal drainage, and surface protection are managed by GeoStabilization International as a single subcontract — coordinating spider, limited-access rig, and rope access operations within your overall project schedule.
Steep slope drilling scopes that depend on rented spider excavators face an availability constraint most specialty subs don't disclose — the equipment is shared across multiple projects, and when another job needs it, yours waits. GeoStabilization International owns its spider excavator fleet outright and maintains it for year-round deployment.
When we commit a mobilization date on your proposal, the equipment is reserved for your project — not contingent on a rental company's availability or a competing job's completion. A drilling subcontract with confirmed equipment availability is worth more than a lower price from a sub who might push your start date.
GeoStabilization International responds to subcontract scope inquiries within one business day. Call or complete the form below.
