Vacuum Excavation / Soft-Dig

Seylone provides vacuum excavation services — also called soft-dig, hydro excavation, or potholing — across the Northeast and Mid-Atlantic for non-destructive utility exposure in congested urban environments. Vacuum excavation uses pressurized water (hydro-vac) or compressed air (air-vac) combined with high-powered vacuum to safely expose buried utilities without the mechanical impact of conventional excavation.

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Soft-dig is the preferred method when underground utilities are closely spaced, when utility owners require non-mechanical exposure, or when the project specification mandates non-destructive techniques. It is especially critical near high-risk infrastructure including gas transmission mains, high-voltage electric feeders, fiber optic trunk lines, and steam systems — where even minor contact during conventional excavation can result in service disruption, safety incidents, or regulatory penalties.

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Crews operate vacuum excavation trucks equipped for both hydro-vac and air-vac methods, allowing the appropriate technique to be selected based on soil type, utility sensitivity, and site conditions. Air-vac is used around electrical infrastructure and fiber optics where water contact is prohibited. Hydro-vac is used in compacted soils, fill material, and clay where air alone cannot effectively loosen the material. Common applications include utility potholing for design verification, daylighting in the 811 tolerance zone, and exposure around high-pressure gas, high-voltage electric, fiber optic, and steam infrastructure.

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Seylone works as a specialty subcontractor to civil and utility engineering firms and as a direct contractor to public agencies, utility owners, and general contractors working in congested urban corridors. Spoils management — containment, transport, and disposal — is handled in compliance with project and environmental requirements.