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New Jersey:  P.A.T.H. Subway Expansion Project

Vibration monitoring critical while tunneling in
highly urbanized area

Our Geotechnical Monitoring Projects

Kilduff Underground Engineering, Inc., was hired to perform design, construction management, and vibration monitoring for a new subway cross-passage tunneling project for the Port Authority Trans-Hudson (P.A.T.H.) in Jersey City, NJ. Vibration monitoring before and during tunnel excavation was specified below-grade at the existing subway platforms the tunnel would be connecting, as well as along the densely urbanized street some 60 feet overhead. Kilduff turned to Inzwa to ensure the excavation activity did not create any adverse impact to existing structures -- including P.A.T.H.'s headquarters directly above the excavation site. 
(Click to learn more).

Denver's North System Renewal Project: Utility Expansion

Protecting Property & Community Relations

The east phase of Denver’s multi-year, North System Renewal Project called for the installation of more than a mile of new, 60-inch pipeline straight through several residential neighborhoods of Wheatridge, CO. To mitigate risk and maintain positive community relations, general contractor Garney Construction turned to Kilduff Engineering to provide vibration monitoring for the length and duration of the project. 

And Kilduff Engineering turned to Inzwa and their Veva III vibration monitors.
Click to read more).

Duchesne River: New Utility Line Excavation

When Remote Vibration Monitoring is a Must

This is going to be a challenge, Michael Tinney thought.

Tinney, Chief Engineer for Kilduff Underground Engineering of Salt Lake City, UT, was tasked with vibration monitoring at a remote construction site in Myton, UT. The project -- the installation of a new utility line running 874 feet under the Duchesne River -- shoring with driven sheet piles and hammer boring that would come within a few feet of an existing high-pressure natural gas line.  Monitoring the potential impact to the gas line from sheet pile driving and hammer boring so close by was mission critical to the project being able to move forward safely.  "If we couldn't successfully monitor these vibrations, the project could grind to a halt," Tinney explained.  (Click to read more).

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Lake Michigan: Pile Driving

Protecting Property & Peace of Mind with Inzwa

When you live on the bluffs overlooking the shores of Lake Michigan, retaining walls can be serious business. And when your next-door-neighbor's ultra-modern house is made predominantly of glass, the concern about the potential for structural damage from pile driving for a new retaining wall can be even more serious.

Alan Levine, principal of Chicago-based The Lighthouse Companies and lead engineer overseeing the project, recommended the use of vibration monitoring equipment during the pile-driving phase of the project. "The need for vibration monitoring while driving piles for a new retaining wall not only mitigates my client's risk - it makes for good neighbor relations," he said. (Click to read more).

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Dedham City Center:  Pile Driving

Inzwa Vibration Monitoring Helped Fenagh Engineering
Stay in Control

Joe Francisco, project management and business development lead with Fenagh Engineering & Testing, likes to be in control.  “We like to control what happens on our projects and be as hands-on as possible," he explained.  So when a long-standing client asked the firm to oversee vibration monitoring on the construction of the new City Center in Dedham, MA, he knew two things: one, that they’d do it themselves vs. subcontracting it out; and two, that he’d want to use Inzwa’s Veva III vibration monitors and Cloud platform to do it.  (Click to read more).

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Orange City, NJ:  Tilt Monitoring

Tilt monitoring of existing structure during construction

SJV Construction was retained by PEEK Properties, Inc. as the supportive excavation engineer for the construction of a new apartment complex in East Orange, NJ.  The construction site posed some unique excavation challenges:

  • Plans called for excavation and construction of lot-line walls, mere feet from a 30-year-old existing building.

  • This building, an original wood-frame structure with two subsequently built additions, had a large, 3/4" crack along the butt joint between the additions.

  • One addition was constructed with 8" block with a return; the other was set on slab-on-grade and was unattached to the original masonry.  They were both unfiled and did not meet building code requirements. Of concern, neither the primary nor the additional masonry had the lateral stabilization typically required.


Given these challenges, SJV's engineer-of-record was concerned that additional movement would be likely to this structure during excavation due to the lack of an appropriate foundation and lateral bracing. He recommended tilt monitoring during excavation and foundation construction to provide continuous information about the movement of the structure during the shoring process. (Please click to read more).

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