Southern California Drainage Channel Repair

Riverside College Drainage Channel Repair

Drainage Channel Repair included Lifting and Leveling of structure and joint sealing against water intrusion

In the southwestern United States, Drainage channels are an important infrastructure tool for ensuring heavy rain events do not cause flash floods and subsequent property damage.  Maintaining these systems is essential to make sure that communities are protected and public works systems, such as roadways, are not interrupted due to washout or pooling water. Riverside City College, located in Riverside, CA, was experiencing problems with a portion of its drainage channel and contacted EagleLIFT to perform the drainage channel repair.

Riverside Drainage Channel Repair

Riverside City College (RCC) had approximately 450 linear feet of its drainage channel that had become undermined by water that was traveling underneath the concrete panels.  The water began to washout the base support soils of the channel, causing voids and settlement along the channel’s bottom and sidewalls.  The College was seeking a cost-effective solution to extend the life of the drainage structure and to avoid the cost of rip and replace.

EagleLIFT recommended and was contracted to inject an expanding polyurethane underneath the drainage channel to stabilize the panels, fill the voids, and seal the joints to restore the water flow over the channel.  The injection approach is a process whereby an industrial grade, high-density polyurethane is injected through 5/8” holes directly into the weak soil zones to stabilize, compact and densify the area.  Once injected, the polymer initially moves throughout the injection point in liquid form, aggressively seeking voids and the path of least resistance, and then it begins to expand throughout the soil media and densify the soil.

Southern California Drainage Channel Repair
EagleLIFT utilized a 4ft injection pattern along the bottom of the drainage structure and half way up the sidewalls.  The pattern design was intended to provide consistent void fill and to adjoin the material to provide effective undersealing of the concrete panels.  Since our polymers are hydrophobic, the material would push out any sitting water and protect the panels against future water intrusion.

EagleLIFT worked as subcontractor under Three Peaks Construction, who was contracted to install an epoxy overlay over certain areas of the channel after the voids were filled. EagleLIFT coordinated all activities with Three Peaks Construction and RCC maintenance staff to ensure work did not interfere with College operations.


All voids under the areas of concern were filled with material usage coming in at 25% under budget.  RCC was able to use the cost savings for additional repair projects that they did not anticipate having the funding to complete.  The project was also completed without any interruption to RCC’s operations.

Culvert Soil Stabilization

Culvert Soil Stabilization Repair at Vandenberg AFB

EagleLIFT Completes Culvert Soil Stabilization Repair at Vandenberg AFB, Saving $1.5B Mission

Culvert Soil StabilizationIn the construction industry, deadlines are a way of life. Whether you are meeting proposal deadlines, managing costs, minimizing weather delays, meeting contract requirements, etc., the clock seems to always be ticking and pressure is continually mounting. However, recently EagleLIFT performed a culvert soil stabilization and slope repair project at Vandenberg AFB that, if not met, the deadlines would be a costly scenario.

Vandenberg AFB is a Department of Defense space and missile testing base located near Lompoc, California. Vandenberg launches a variety of critical rocket missions for military purposes and also leases launchpad facilities to SpaceX. As you can imagine, its activities are high-profile, high-budget, and highly sensitive to delays.

During the 2016-2017 rainy season, Vandenberg experienced extensive storm runoff that damaged an 84 inch, 200ft long corrugated metal drainage culvert, causing collapse at three separate locations and further degraded the culvert’s corroded bottom. The damage to the culvert caused severe inflow and infiltration (I/I) which destabilized an adjacent slope along the main supply road leading to Space Launch Complex 6 (SLC-6).

When an approximate 30ft deep sinkhole opened up by the supply road, a bypass road had to be installed in order to continue launch operations until a permanent fix was designed for the culvert. When concern began to grow that a 20ft high section of the adjacent slope would slip and the sinkhole wound endanger the new bypass road and delay an upcoming $1.5 billion mission, Vandenberg sought for a temporary fix to strengthen the culvert, slope and avert disastrous and costly delays.

When Vandenberg began designing a repair, the solution was to address 1.) culvert soil stabilization and restoring usable capacity, 2.) ensuring the slope would not slip, and 3.) not impact the environmentally sensitive habitat on the slope.

For the culvert soil stabilization, the AFB determined that chemical grout would be used to stabilize collapsed sections from degrading further into the culvert. The entire culvert was to be stabilized to prevent further soil migration and seal it against further I/I, and the corroded bottom of the CMP would be restored using a flowable fill.

For the slope, a “wedge” injection pattern was designed to provide structural stability at the bottom of the slope and lateral stability to prevent slippage that would cause structural damage to the culvert and irreparable damage to the sensitive environment the slope supports.

“Initially, Vandenberg’s solution for the slope repair consisted of using a compaction grout to provide a dense material for slope stability,” stated Cliff Frazao, Chief Operations Officer of EagleLIFT. “When we were approached for the project we had concern that the compaction grouting footprint could be detrimental to the environmental mission of the project and add too much weight to the area and cause further issues with the culvert.”

Based on these concerns, the slope “wedge” injections were rescoped to utilize a specialized formula of chemical grout that was hydroinsensitive, light-weight and highly expansive. The material’s initial permeation and structural capacity gave Vandenberg confidence in this alternative.

To meet the environmental compliance needs of the project, extensive preparations were necessary to minimize potential delays and protect endangered species that called this site their home. Some of the species included California Buckwheat, El Segundo Blue Butterflies, Tar Plants and the Red-Legged Frogs. To ensure the endangered plant/wild life habitat wasn’t inadvertently violated, environmentalists were onsite to pre-mark the plant life and be on the lookout for wildlife. If any of these species were disturbed or damaged, the project could have seen an immediate shutdown.

In regards to the culvert, EagleLIFT stabilized its entire 200 ft length. At the crushed joints, a 2ft injection of chemical grout created a thick arch of material and densified aggregate. The arch was designed to provide a convex, dense structural layer that would help provide structural stability and reinforcement to the crushed CMP. This would help mitigate further damage from occurring and re-establish limited drainage capacity.

The remaining portions of the culvert were stabilized using a consistent gridded injection pattern. The goal here was to fill any annular voids and restore the bearing capacity of the adjacent support soils.

“This was a high-profile project with an approximate $1.5B mission and national security at stake,” stated Carlos Castillejo, Project Manager for EXBON, the General Contractor for the project. “All eyes were on the EXBON-EagleLIFT Team to complete the project successfully and without delay, something we did with absolute success!”

The terms of the project were to complete the project in a 30-day window, spanning from September 14 – October 14, 2017. The project was completed in 8 days with no delays or adverse environmental impacts.

“We would like to thank both Vandenberg and EXBON for their confidence in EagleLIFT, and we were glad to be a small part of ensuring the missions of our military are executed with the utmost quality and efficiency,” says Donald J. Moody, President and Owner of EagleLIFT. “As a retired USAF Colonel, I take great pride to ensure that EagleLIFT’s operations are top notch especially for our military clients.”

About EagleLIFT
EagleLIFT has offices in Ontario, CA, Concord, CA, Las Vegas, NV and Rialto, CA. EagleLIFT is a Class “A” General Engineering Contractor and holds SB, SBE and DVBE certifications and services Arizona, California and Nevada.

Multi Residential Slab Lift Selmar CA

Multi Residential Slab Lift – Selmar, CA


Project Challenges

Client:   Multi Residential Slab Lift
Location:   Selmar, CA
Project Summary: Reinforce, Lift and Stabilize a post-tension slab

Heavy Rains caused washout under a post-tension slab that had yet to be tensioned, causing the slab to settle 3-inches. Based on Geotechnical engineer potholng data, weak soils were determined to be along an adjacent retaining wall and soil loss was recorded from the 3 building slabs all the way to the wall.

Solutions and Results

The goal of the project was to stabilize and densify the soils underneath the perimeter of the building to the retaining wall to lift the slab and allow the home builder to tension the post-tension slab.  We stabilized the soils using our deep injection process using a hydro-insensitive two-part chemical grout.

The injections were made on a 5ft grid pattern at 10′ and 5′ depths to stabilize the soils at depth and to create an upward lift to the slab.  The project was completed in 3 days and all three buildings were stabilized and lifted back to grade.  The contractor was able to tension the post-tension slabs and get the project back on schedule.

Our Projects

California Water Service Generator Building Slab Lift


Generator Building Slab Lift Project Challenges

Client:   California Water Services
Location:   Bakersfield, CA
Project Summary: Pump Station Generator building had severe settlement due to a severed water line undermining the support soils.

A pump station building holding backup generators was experiencing severe settlement after an 8-inch water line severed and undermined the support soil. Publicly bid project that was initially designed to use helical piers, as bedrock was at -70′ and the piles would be able to support the structure at -40′.

Generator Building Slab Lift Solutions and Results

Based on the engineering report, EagleLIFT determined that up to -20′ consisted of weak soils and could be strengthened using a two-part chemical grout and a specialized injection method, referred to as Deep Injection.  EagleLIFT provided an alternate bid and subsequently won the project.  After a 4 day installation, EagleLIFT stabilized and lifted the slab to grade and repaired the cracks using carbon fiber staples and epoxy.

Our Projects

Pine Creek Voidfill

Pine Creek Mine Void Fill and Foundation Lifting

Foundation Lift and Void Fill of building at the Pine Creek Mine

Pine Creek Voidfill2

Project Challenges

Client:   Pine Creek Mine
Location:   Bishop, CA
Project Summary: Foundation Lift and Void Fill of building at the Pine Creek Mine

Customer needed to lift, stabilize and void fill underneath a building that was settled as much as 15” in the most severe corner. The entire footer of the building was encased in an underground network of timber that was part of the 38ft. retaining wall cribbing. Timber removal was a challenge to access the footing, for each push pier install.

Solutions and Results

30 push piers installed along the perimeter of the back wall, and halfway down the perpendicular side walls of the building. Expanding polyurethane injected beneath the slab to fill the voids created by the lift. Although the goal was to recover the 15”, the building was lifted 10” before the tension rods of the building could become dangerously tight.
Project duration was 5 days.

Our Projects

Gila County Courthouse Soil Densification 2

Gila County Courthouse Soil Densification

Utilize Chemical Grout Shallow Surface Injection for soil densification and to lift and level the southwest corner of the building.

Gila County Courthouse Soil Densification 2

Project Challenges

Client:   Gila County Courthouse
Location:   Globe, AZ
Project Summary: Utilize chemical grout for soil densification and to lift and level the southwest corner of the building as much as is practicable.

An area of soil at the southwest corner of the building subsided after a recent rain storm. The subsided area measured approximately 30 feet in diameter and had a depression roughly 6 to 8 inches lower relative to surrounding areas

Solutions and Results

Utilize chemical grout to lift and level the southwest corner of the building as much as is practicable. This scope of work included underpinning approximately 40 linear feet of the building extending east and north from the southwest corner of the building.

Since there were no foundation or pavement to provide confinement, trench plates were used to resist the expanding material for the greatest densification of subgrade possible. Weak soils were successfully densified.

Our Projects

Cooper Chase Retaining Wall Soil Stabilization

Cooper Chase Retaining Wall Soil Stabilization

Retaining wall soil stabilization to prevent soil collapse after retaining wall removal and installation of push piers.

Cooper Chase

Project Challenges

Client:   Cooper Chase Construction
Location:   Bass Lake, CA
Project Summary: Retaining wall soil stabilization to prevent soil collapse after retaining wall removal and installation of push piers.

A broken city water line undermined a 100-year-old, 16 ft.tall retaining wall between two vacation homes. EagleLIFT was contracted to provide retaining wall soil stabilization for the homes to prevent settlement, prior to retaining wall being removed and a new wall rebuilt. Soil stabilization to prevent soil collapse after retaining wall removal.

Solutions and Results

Push piers were installed under the perimeter wall of the home, as well as the garage on the high side of the retaining wall. Piers driven to depths of -40’.

Two rows of polymer injection were installed along perimeter of retaining wall to stabilize soils and prevent caving during removal and replacement of wall. Injections were made on 3’ centers and at 3’ vertical depths down to -18’ below grade.

Project support was provided by Cooper Chase Construction as the General Contractor, Brooks Ransom Engineers provided structural engineering, and Technicon Engineers provided the Geotechnical Engineering.

Crews battled snow and rain but were able to complete project on schedule. Retaining wall was removed and replaced without issue.

Our Projects

Skyline Parc Multi Residential Building Settlement

Skyline Parc Multi Residential Building Settlement

Slab Lift, Void Fill and Deep Injection Soil Stabilization to Repair Multi-Residential Apartment Building Settlement

Pool Wide Crack

Project Challenges

Client:   Skyline Parc Apartments
Location:   Las Vegas, NV
Project Summary: Slab Lift, Void Fill and Deep Injection Soil Stabilization of Multi-Residential Apartment Building

The Skyline Parc apartments in Las Vegas, NV was experiencing severe building settlement due to poor site drainage that was washing our foundation soils along the back perimeter of the building. The poor drainage caused settlement of nearly 9 inches and needed to be repaired quickly.

EagleLIFT was contacted by SFA Engineers to determine that Deep Injection would be a good fit for lifting and stabilizing the building and the adjacent pool deck.

Solutions and Results

Deep Injection was an ideal fit for soil stabilization and lifting the foundation for this job.  The reason is that voids were found throughout the building perimeter and the soils were loose and needed to be stabilized to prevent further washout.

The approach used injection locations at every 4 feet.  With this plan, the polymer would expand and densify the soil.  This would create upward movement and help lift the structure.  Additionally, the soils were stabilized and the voids were filled, preventing any future building settlement.

Our Projects

Helical Pile Seismic Upgrade – El Segundo, CA

EagleLift Installs 25 Helical Piles for a Foundation Augmentation Helical Pile Seismic Upgrade Project for a Structure in El Segundo, CA

Segundo Piers Ad EagleLIFT

Project Challenges

Client:   Xerox Corporation
Location:   El Segundo, CA
Project Summary: Helical Pile Seismic Upgrade Project for a Structure in El Segundo, CA

The building in El Segundo was formerly occupied by Xerox Corporation, and the owners decided to convert the building into a mixed use facility or both commercial and residential use.

The original deep foundation plan specified 24” caissons to support the staircases, but the low head clearance eliminated this option. Helical piles were selected, and the (25) helical piles were installed to add support for staircases and interior columns. The helical piles also provided a seismic upgrade solution for the structure.

Solutions and Results

The helical piles consisted of a 2.00” RCS lead section with 8”,10”,12”,14” helix bearing plates. Following the lead section were 4.50” round shaft sections used to reach the 25 ft. average install depth.

The very low head clearance provided challenges for the crews as did some newly installed underground utilities. An open basement around two of the column pad areas required crews to wear fall protection gear during the installation.

A tension test was successfully completed to 2x the design load of 150 kips. The install work was tedious and time-consuming with having to deal with so many variables, but the project was successfully completed in (7) days.

Our Projects

Olinda Landfill – Channel Voidfill and Stabilization

Olinda Landfill – Channel Voidfill and Stabilization

Olinda Landfill Injections 2

Project Challenges

Client:   Olinda Landfill Channel Stabilization and Voidfill
Location:   Brea, CA
Project Summary: Drainage Channel Stabilization of the Olinda Landill
The Olinda landfill in Brea California was experiencing severe voids in its drainage channel voidfill and needed stabilization.  The area of the voids was approximately 560 linear feet.  The extent of the voids was unknown, as DCP tests would have pierced the moisture barrier at the center of the channel.

Solutions and Results

Channel Voidfill and Stabilization Solution

To stabilize the channel’s support soils and fill any present voids, EagleLIFT installed injection rods at 45 degree angles on 4ft centers.  The injection depths were at 5′ and 8′ to ensure any existing voids along the bottom of the channel were filled.


Voids were filled and extreme settlement and cracking of the channel was averted.

Our Projects