Our Services
L4H One Pass Trenching delivers engineered, compliance-ready subsurface systems that meet EPA, Army Corps of Engineers, and DEQ standards in a single, efficient pass. Our custom-designed trencher is the only one in the industry with integrated soil condition detection and recording, giving you the confidence that every foot of soil meets project specifications and regulatory requirements.
When groundwater control and environmental protection are critical, our cutoff walls provide reliable barriers that meet strict permeability requirements. We construct walls with: Soil-bentonite, Soil-cement-bentonite, Reactive media for contaminant capture
APPLICATIONS:
- Landfill containment
- Dam and levee seepage control
- Hazardous waste site isolation
- Permeable reactive barrier trenching
KEY BENEFITS:
- Installed under static water tables without dewatering
- Minimal soil handling, reduced environmental impact
- Meets Army Corps and EPA trench wall specifications
Our one-pass collection trenches combine excavation, pipe installation, and backfill into a single operation, no open excavations, no shoring, and no dewatering required.
Capabilities:
- Sump and pump systems
- PRB and bio-walls
- Air sparge systems
- Deep dewatering (up to 50 feet)
- Multi-pipe and custom backfill
Industries Served:
- Mining tailings drainage
- Industrial site remediation
- Municipal water capture and redirection
We mix and install engineered barriers underground, creating impermeable, homogeneous walls to depths of 75+ feet. Our process supports tight site configurations without large excavation footprints.
Additives include:
- Bentonite
- Portland cement
- Slag cement
- Project-specific blends for strength and permeability
Applications:
- Slurry wall alternatives
- Slope stabilization
- Dam and levee reinforcement
- Contaminant plume containment
Specialized Applications
Some trenching challenges demand more than a standard approach. Our equipment and team deliver tailored solutions such as:
- Leachate Management Trenches
- Groundwater Interception Systems
- Slope Drainage Interceptors
- Tow Drain Trench Systems
- Hydraulic Barrier Wall Trenching
Our custom-engineered trencher combines excavation, material placement, and backfill in a single continuous operation, installing collection systems and barrier walls to depths of 60+ feet. This integrated approach eliminates multi-step processes and accelerates project timelines without compromising precision.
Capabilities include:
- Dewatering operations (18-40 feet)
- Soil mixing operations (48-60 feet)
- Dual-mode hydraulic control systems
- Real-time compliance monitoring and data export
APPLICATIONS
- Environmental remediation trenching
- Groundwater collection systems
- Cutoff and containment walls
- Leachate management infrastructure
WHY CHOOSE L4H
Our custom-built trencher integrates soil monitoring and recording for unmatched compliance assurance.
Experience meeting and exceeding EPA, DEQ, and Army Corps trenching standards.
Less disruption, faster timelines, and reduced labor costs.
Capable of trenching in confined, active, or environmentally sensitive sites.