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Protected: Twin Falls Pump House Shoring Support
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Helped the GC maintain construction progress after unstable cut conditions required a temporary shoring pivot.
2 weeks
Drilled 8-inch-diameter holes up to 20 feet deep in rock for H-pile shoring support.
Active construction environment at a pump house cut, with rock drilling performed to support shoring installation.
The work supported construction of a City of Twin Falls pump house by helping stabilize an unstable cut condition so the broader facility work could continue.
IMCO General Construction for the City of Twin Falls.
Twin Falls, Idaho.
During pump house construction in Twin Falls, IMCO needed to respond to unforeseen unstable cut conditions. GRW rapidly mobilized specialty drilling capability to drill 8-inch-diameter holes up to 20 feet deep in rock for H-piles The work helped the GC keep the project moving under a tight schedule.
The project required GRW to support a rapid field pivot after unforeseen site conditions changed the shoring approach. It also involved GRW’s first recorded use of 8-inch rock-drilled holes for this type of temporary shoring support.
Unpredictable Geotechnical Conditions: The Malibu canyon environment presented highly variable ground conditions. During subsurface drilling, the crew encountered collapsing hole conditions that threatened to halt progress. This required immediate, on-the-fly collaboration with project engineers to completely redesign the anchor system in the field, ultimately utilizing two-component cable anchors to secure the barrier.
Severe Access & Spatial Constraints: Navigating a tight drainage channel left virtually no room for error. The team had to meticulously plan and carve out access for heavy equipment, including a 20-ton excavator-mounted drill and purpose-built mobile grout plants, operating within a highly constrained canyon footprint.
High-Stakes Traffic Coordination: Because the site was situated directly above the Pacific Coast Highway (Route 1)—one of California’s busiest and most critical coastal arteries—the project required seamless public-roadway coordination. Managing staging, equipment access, and traffic control without disrupting the flow of the highway required precise logistical execution.
Emergency Timelines & Weather Threats: As an emergency Caltrans project responding to recent wildfire damage, time was of the essence. The team had to race against strict daylight limitations and impending winter storms. Preventing a catastrophic debris flow meant the barrier installation had to be completed flawlessly before the wet season arrived, leaving absolutely no margin for schedule delays.
Specialty precision rock drilling for a 8″ DTH with dust suppresion. GRW mobilized specialty tooling and drilling support to advance 8-inch-diameter holes up to 20 feet deep in rock. The work supported temporary shoring of an unstable cut so pump house construction could continue. The approach relied on rapid mobilization, field coordination, and specialty equipment selection rather than a standard shoring sequence. Specialty drilling tooling with support from Petra Drilling Supply and Word Rock Drills. No contracted engineer was identified GRW responded by quickly mobilizing specialty tooling and drilling capability for larger-diameter rock holes. This allowed IMCO to pivot from the original condition to temporary H-pile shoring support without losing unnecessary time to procurement or means-and-methods uncertainty.
Completed drilling support for temporary shoring. No project-specific safety incidents GRW gave the GC a fast specialty-drilling solution when unforeseen site conditions threatened schedule continuity. The work supported continued delivery of municipal pump house infrastructure for the City of Twin Falls. This project reflects GRW’s role as a responsive specialty geohazard and shoring partner: solving difficult field conditions with practical drilling capability, rapid mobilization, and constructible execution support.
Completed drilling support for temporary shoring. No project-specific safety incidents GRW gave the GC a fast specialty-drilling solution when unforeseen site conditions threatened schedule continuity. The work supported continued delivery of municipal pump house infrastructure for the City of Twin Falls. This project reflects GRW’s role as a responsive specialty geohazard and shoring partner: solving difficult field conditions with practical drilling capability, rapid mobilization, and constructible execution support.
An unstable cut condition threatened pump house construction progress and required temporary shoring support. GRW was engaged for specialty drilling capability, rapid mobilization, and the ability to support a GC’s field pivot under schedule pressure. Main constraints: unforeseen site conditions, unstable cut conditions, larger 8-inch rock drilling, specialty tooling needs, and a tight GC schedule.
Without a timely shoring solution, the unstable cut could have delayed pump house construction and increased safety, access, and schedule risk for the GC and owner. Rapid specialty drilling mobilization for larger-diameter rock holes needed to support H-pile temporary shoring. 8-inch-diameter holes drilled in rock.
There is no excerpt because this is a protected post.
There is no excerpt because this is a protected post.
Project Overview Location: Carpenter Lake, British Columbia Sector: Utility / Power Distribution Timeline: 2024 (Completed) Scope: Remote Foundation Preparation, Rigging, and Specialized Rescue Standby Maintaining
When your project is high elevation, high risk, or both, you want the most experienced team on the job. Our seasoned technicians are ready to take on the most complex geohazard projects to keep your site and community safe.