James Sommerville, Inc. delivers comprehensive horizontal site work and underground infrastructure construction. Equipped with modern telemetry machinery and supported by a seasoned estimating office, we manage site packages from clearing and mass cut-and-fill to final structural striping.
Grading & Earthwork
Before any structure rises, the soil must be stabilized, balanced, and graded. JSI brings state-of-the-art Caterpillar excavators, scrapers, and GPS-guided grade graders to shape sites to architectural tolerances. We manage balanced dirt, structural fill imports, and sloped hillside stabilizer cuts.
- Mass Site Excavation
- Hillside Terracing & Cuts
- Subgrade Stabilization
- Demolition & Site Clearing
- Foundation Footing Digs
- Erosion Control Grading
Asphalt Paving & Maintenance
We install smooth, high-load asphalt systems engineered for long service lives. From access roads to heavy logistics center parking surfaces, our paving crews manage sub-base aggregate compaction, uniform hot-mix asphalt layers, and final cosmetic protection and parking layout painting.
- Hot-Mix Asphalt Paving
- Roadway Asphalt Overlays
- Aggregate Base Compaction
- Slurry Sealcoating
- Thermoplastic Striping
- Trench Cut Patching
Underground Utilities
Modern infrastructure requires reliable subsurface networks. JSI is certified to assemble wet and dry utility systems. We navigate complex subsurface grids, manage deep shoring operations, connect main sewer pipelines, and lay dry electrical conduits compliant with utility carrier standards.
- Sewer Mainlines & Laterals
- Storm Water Drainage Runs
- Water & Fire Protection Lines
- Electrical/PG&E Conduit Runs
- Precast Concrete Manholes
- Septic Systems
Concrete & Foundations
We deliver high-durability concrete structures and structural repairs engineered to handle heavy loading. Our concrete crews handle everything from building slab preparation to structural footings, concrete retaining walls, and subgrade foundation underpinning repairs.
- Commercial Concrete Slabs
- Structural Foundations & Footings
- Concrete Retaining Walls
- Foundation Repair & Underpinning
- ADA Curb Cuts & Walkways
- Decorative & DG Paths