Remedial Construction
Sevenson is the recognized leader in remedial construction. We consistently deliver best in class services to our customers.
Sevenson is one of a few remedial action contractors with roots in general construction
This general construction background enables Sevenson to look at a particular site remediation project from a practical, operations-oriented point of view. This often leads to ideas for cost savings through modest changes in the project plan which can yield significant results. As a hands-on contractor, Sevenson prefers the greater operational control of performing a project with its own forces as opposed to using subcontractors. Consistent with this policy, Sevenson owns and maintains its own fleet of traditional and specialty construction and marine equipment.
Sevenson is the leader in
remedial construction
Benchmark in the industry since the
Love Canal dominated headlines in 1978
Completed 1,500 projects
including 141 Superfund sites
Over $5.3 billion in revenue
Keenly aware of the regulatory issues
governing environmental projects
Proponent of the Partnering Approach
to executing work
Sevenson’s projects require a
range of services including:
Remedial Construction
- Excavation and earthwork, including landfill construction and closure
- Hazardous, toxic, and radiological waste materials handling, processing and treatment
- Innovative and traditional steel sheeting systems
- Sludge solidification and soils stabilization
- Chemical treatment/heavy metals fixation
- Slurry wall and trench construction
- Collection, recover, and treatment systems construction
- Facilities decontamination and demolition
- Temporary and mobile water treatment systems design, construction and O+M
- Constructability review during the design phase
Environmental Dredging
- Sediment remediation
- Hydraulic and mechanical dredging
- Dewatering and volume reduction (liquids/solids separation)
- Temporary and mobile water treatment systems design, construction and O+M
- Capping and armoring
- Habitat restoration
- Constructability review during the design phase
Earthwork & Excavation
Completed hundreds of environmental projects requiring removal actions, landfill construction and closures, and material handling and processing. Learn MoreMetals Treatment
& Chemical Fixation
MAECTITE® chemical treatment is a treatment process to chemically fixate heavy metals. Learn MoreSolidification & Stabilization
Experienced in a wide variety of reagents including fly ash, cement, cement kiln dust, pozzalime and combinations of products, to achieve acceptable results and meet approved criteria per specifications. Learn MoreTraditional & Innovative
Steel Sheeting Systems
Sevenson installs steel sheeting systems for a variety of applications and site conditions. Learn MoreProject Gallery
Emory River Dredging and Dewatering
St. John Retention Pond Closure & Stream Cleanup Project
Former Clark and McMaster Street MGP Site
Cabot Koppers Superfund Site Phase 1 Remedial Action
Former Kil-Tone Company Superfund Site Operable Unit (OU) 1 Remedial Action Phase 2
Martin Aaron Superfund Site, Remedial Action Phase 1, OU-1
Former Portland Gas Manufacturing (PGM) Site Remediation
New Bedford Harbor Superfund Site
Hatheway and Patterson Superfund Site
PGE Potrero Power Station Sediment Remediation
Former Sunflower Army Ammunition Plant Contaminated Pipe Removal
Former Seneca Falls MGP Site
Study Area 6 Remediation Project
Mitchell Bay Interim Corrective Measure Remediation of Docks 6 and 7
Upland Soil and Contaminated Sediment Removal, IL.
Vanadium Site Operable Unit #3 Remediation
Welsbach/General Gas Mantle Superfund Site
Former Tannery Site Remedial Action
Syncon Resins Superfund Site – Operable Unit 2 Remediation
NYSDEC Dzus Fasteners Site
Former Bay City Manufactured Gas Plant Site
Former Hackensack Gas Works Site Area E Sediment Remediation Project
Fort Wayne Former MGP Sediment Remediation and CSO Outfall Improvement
Clean Closure of Five Coal Ash Ponds D.W. Mitchel Generating Station
Former Zephyr Oil Refinery Site – Fire Suppression Ditch Area Remediation
Wagner Creek and Seybold Canal Restoration Project
Bayou d’Inde/Lower Canal Sediment Remediation
Buffalo River Sediment Dredging and Habitat Restoration
Flint River Sediment Remediation East Boulevard Former MGP Site
Horseshoe Road Superfund Site
Indiana Harbor and Canal CDF South Cutoff Wall
River Raisin Area of Concern NAPL Area Sediment Dredging and Capping
Sediment Remediation Acid Brook Delta Dredging and Dewatering
St. Maries Creosote Superfund Site
Study Area 7 Sediment Dredging and Capping
Former Williamsburg Works MGP Site
Shpack Landfill Superfund Site Remedial Action
Onondaga Lake Superfund Site Dredging and Capping Services
Study Area 5 – Remediation of Hexavalent Chromium Contaminated Properties
Site Brook & Debris Piles Remediation Former CE Windsor Site
Silver Lake Removal Action and Sediment Cap Installation
Roebling Steel Company Superfund Site
Newhall Street Neighborhood Non-Public Properties Remediation
Military Munitions Non-Time Critical Removal Action
Menominee River Sediment Removal
Coal Tar Plant Sediment Remediation
Former Saranac Street MGP Site
Former Plant Site Remediation
Federal Creosote Superfund Site
DuPage River Sediment Remediation
Court Street MGP Site
Cornell-Dubilier Electronics Superfund Site – OU2
Former Clifton MGP O.U.2 Remediation
Cherry Island Landfill Expansion
Cecil County Central Landfill Cell 4 Redevelopment
Sheboygan Harbor Sediment Dredging