environmental

superfund

canal remediation & clsm

Project Overview

Provided commercial diving and marine construction support services for a large-scale canal remediation and environmental restoration project at an EPA-designated Superfund site. Operations supported contaminated sediment removal, engineered backfill placement, environmental containment, and restoration of impacted waterways through diver-assisted excavation, shoring, and Controlled Low Strength Material (CLSM) placement activities.

Scope of Work

EPA Superfund site remediation
Canal restoration and environmental cleanup
Diver-assisted excavation support
Contaminated sediment remediation
Shoring and excavation support
CLSM placement operations
Tremie placement support
Environmental containment operations
Underwater inspection and verification
Marine construction support

Services Performed

Diver reconnaissance and pre-construction assessments
Support of contaminated sediment excavation and removal operations
Identification and removal of submerged debris and obstructions
Underwater excavation and bottom preparation activities
Verification of excavation limits and design elevations
Installation and monitoring of excavation support and shoring systems
Diver-assisted positioning and inspection of sheet pile and shoring components
Preparation of canal bottom for engineered backfill placement
Support of Controlled Low Strength Material (CLSM) placement operations
Monitoring and verification of tremie pipe placement during underwater CLSM pours
Diver observation of material placement to ensure proper coverage and prevent segregation
Verification of fill elevations and placement tolerances
Inspection of completed remediation and restoration areas
Photo and video documentation of completed work
Environmental compliance support throughout construction operations

Equipment & Tools Utilized

Surface-supplied diving systems
Diver communications systems
Tremie placement systems
CLSM placement equipment
Excavation support equipment
Sheet pile and shoring systems
Crane and excavator support equipment
Rigging gear and lifting slings
Survey and positioning equipment
Underwater hand tools
Inspection cameras and documentation equipment
Hydraulic and pneumatic tools

Key Project Elements

EPA Superfund Site
Environmental Remediation
Canal Restoration
Contaminated Sediment Removal
Diver-Assisted Excavation
Shoring and Excavation Support
Controlled Low Strength Material (CLSM)
Tremie Placement Operations
Environmental Containment
Underwater Inspection
Marine Construction Support
Long-Term Site Restoration

Safety & Environmental Compliance

Work was performed within a regulated environmental remediation project under strict health, safety, and environmental requirements. Operations included daily safety briefings, environmental protection measures, controlled material placement procedures, contamination prevention protocols, and continuous coordination with remediation contractors, engineers, and environmental oversight personnel.

Technical Highlights

Diver-assisted support of contaminated canal remediation activities.
Monitoring and verification of underwater CLSM placement through tremie systems, allowing material to be placed below water without segregation or turbidity issues.
Support of excavation and shoring operations necessary to safely restore canal geometry and stabilize surrounding infrastructure.
Verification of final grades and material placement to support long-term environmental containment and site restoration objectives.