Utility Trench Repair California

La Quinta, CA Utility Trench Repair and Soil Stabilization

Utility Trench Repair and Soil Stabilization of a California Roadway

Chemical grout injection process to stabilize and lift the roadway

Utility trench repair requiring stabilization of the utility trench’s support soils that were loosely compacted causing subsidence and settlement of flexible pavement roadway.

Project Challenges

Client:   City of La Quinta, CA
Location:   La Quinta, CA

The City of La Quinta, CA was experiencing substantial roadway settlement that was due to soil subsidence caused by loosely compacted soils around a utility trench.  The cause of the soil subsidence was believed to be because of the improper compaction of the sandy soils at the base of the trench and also potential inflow and infiltration into the clay pipe.  The utility trench repair was needed and the soil needed to be stabilized and compacted to prevent further subsidence and roadway settlement.

The problems were also being exacerbated by the ever increasing weight of the flexible pavement road.  In order to relevel the roadway, the City would be forced to repave over the road and temporarily level it.  The added weight only increased the subsidence, as the soils were not able to bear any additional loads. The City of La Quinta needed an innovative solution to complete this utility trench repair project.

Solutions and Results

1,170 linear feet of the the roadway and utility trench needed to be stabilized.  In order to do this, the soils above the 15′ deep sewer line needed to be compacted and its weight bearing capacity needed to be re-established.  Another part of the utility trench repair was to lift and level the roadway.

EagleLIFT utilized a chemical grout injection process to stabilize the soils and to lift the roadway back to grade.  Through 5/8″ holes and metal tubes inserted 5′ and 10′ above the utility trench and at 3′ to the left and right of the center locations.  Since the primary roadway settlement was occuring immediately above the trench the key was to densify and create upward movement in the center injection points.

The patterened injection method ensured that the soils would no longer subside and collapse into the trench. In summary, the entire 1,170 linear feet of the trench was stabilized in 7 working days and ahead of schedule. The flexible asphalt pavement was lifted and leveled and the work was completed in the daytime hours to reduce noise disruption.

Roadway Lift Chemical Grout

Our Projects

Trenchless Sewer Repair Arizona

Arizona Sewer Repair

Project Challenges

Client:   Arizona Municipalities
Location:   Arizona
Project Summary: Trenchless Sewer Repair Arizona infrastructure program

EagleLIFT, Inc. completed a series of projects in which public agencies throughout Arizona had called upon the use of a high-density polyurethane injection (HDPI) system to densify problem soils around underground infrastructure and lift sunken concrete structures back to their intended elevation.

In areas where previous asphalt repairs had been made and failed, reoccurring settlement was proven to be the result of unstable soils at depths greater than the previous repairs had rectified.

In some cases, the DCP results identified soil to be highly compressible and of little load-bearing capacity at depths from 0-15′ feet below grade.

Solutions and Results

As the sole licensee of this patented high-density polyurethane injection method in the states of California, Arizona and Nevada, EagleLIFT, Inc. was able to serve as a subcontractor to area companies already under contract with these owner-agencies.

The polyurethane injection system used by EagleLIFT only requires advancing 1/2″ injection tubes into the soil to accomplish proper soil densification, lift a foundation or pavement, and stabilize structures against settlement in the future.

In using this method of soil remediation the projects were analyzed and completed very quickly with minimal intrusion to the public’s use of the affected infrastructure.

What’s more, these projects are considered a permanent solution and cost the owner-agencies significantly less than conventional repair options.

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Our Projects

CMP Trenchless Sewer Repair

Sewer Repair Glendale California

CMP Trenchless Sewer Repair

Project Description

Client:   City of Glendale, CA
Location:   City of Glendale, CA
Surface Area: 450,000 m2
Year Completed:   2014

The 130 foot long culvert ran on an angle, approximately 30’ below grade in a north south direction. Over time, the stream had begun to erode the base soils beneath the culvert creating a void along the base and sides. The concern was that the weakening and erosion of these base soils would eventually lead to subsidence and/or shifting of the culvert and deflection at the surface where there were future plans for construction.

EagleLIFT was chosen for the following reasons. First, all work could be completed with zero excavation and no disruption to the surroundings on the surface. Secondly, laboratory testing of the material used proved that it maintains its integrity for more than 10 years with no shrinkage or degradation. Recent studies of other one-part grouts found that conventional grouts are significantly impacted by the factor of time and “wet/dry” cycles.

The Challenges

The URETEK Deep Injection Process was used by the City of Glendale to void fill and stabilize a local culvert. This unique process relies on the expansive properties of a two-part expanding resin system (an expansion co-efficient of twenty to one) and a quick cure (25 second cure time), to seal and void fill while stabilizing weak soils around the structure.


The two-part polymer material is injected from within the culvert through five-eighths inch diameter holes drilled through the sidewalls of the culvert. The hydro-insensitive material then expanded and travelled the path of least resistance filling any voids and essentially encapsulating the bottom half of the culvert.


The injection process took three days to complete with all voids filled and soils stabilized. The process was quick, clean extremely cost effective, and will certainly maintain and prolong the lifespan of the two culverts.

All parties were very pleased with the work done, the short length of time it took to successfully complete the project and the cost savings that resulted from hiring EagleLIFT.

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