Supporting utility and energy infrastructure projects with field-proven execution—specializing in underground utilities and complex site development within active environments.
Trusted to execute underground electrical and civil infrastructure in live environments — by
United Illuminating, Eversource Energy, Gulf Oil, and Buckeye Partners contract DeLeo because the work is performed inside active infrastructure — utility corridors with energized cable in adjacent conduit, substation yards with live switchgear, fuel terminals with ongoing operations. The system cannot go down. DeLeo's crews execute in live systems, coordinate protection plans with utility engineers, manage phased switching and outage windows, and deliver to the technical standards IOUs and energy operators require on every project.
Concrete-encased ductbank, conduit runs, and cable pathways installed inside active utility corridors — adjacent circuits stay energized throughout. DeLeo holds the 5-year UI/Avangrid framework contract (2024–2029) for statewide underground distribution work.
Precast and cast-in-place electrical vaults, manholes, and access chambers — installed to utility specification with full conduit entry, sump, and frame/cover integration. Structure placement is coordinated with ductbank geometry and future cable pull distances.
Site preparation, structural concrete (equipment pads, transformer foundations), drainage, and access infrastructure for substations, fuel terminals, and industrial energy sites — delivered to engineering tolerances, not general grading standards. Scoped around equipment footprints and facility operations.
Conduit entry, ductbank tie-ins, and trenching inside active station yards — sequenced around switching operations and executed under the protection protocols established by the utility's protection engineers. The station stays running throughout construction.
A. DeLeo Construction Company has operated as an underground utility and civil contractor in the Northeast energy sector since 1994. The client base — United Illuminating, Eversource Energy, Gulf Oil, Buckeye Partners — reflects work performed inside the environments those clients operate: active distribution corridors, substation yards, fuel terminals, and industrial energy facilities where construction must proceed without forcing system outages.
DeLeo holds a 5-year framework contract with United Illuminating (Avangrid) covering underground electric distribution work statewide. The workforce is LIUNA-affiliated, trained in confined-space entry, lockout/tagout, and the protection protocols required in active electrical environments. Field supervision coordinates directly with utility construction managers on sequencing, outage windows, and protection plans throughout execution.
Utility infrastructure work is not self-contained. Ductbank runs pass within feet of energized cable. Vault installations require open excavations adjacent to live distribution infrastructure. Substation civil work is sequenced around equipment commissioning and utility protection windows. Managing that complexity without disrupting system operations is the job.
DeLeo's field crews are experienced working within those constraints. Foremen coordinate directly with utility construction managers on sequencing, outage windows, and protection requirements. Work is planned to maintain system continuity and executed under the safety protocols required in active electrical environments.
Scope review, utility locates, protection engineer coordination, sequencing plans, and traffic control permitting are completed before groundbreaking — not in parallel with it.
Crews are trained in minimum approach distances, PPE requirements for high-voltage proximity, and the utility-specific protection procedures required when working adjacent to energized systems.
Phased installation, planned cutover windows, and temporary routing allow distribution systems to remain operational while permanent infrastructure is installed and tied in.
The technical scope is only part of what a utility contractor delivers. Sequencing around live systems, coordinating with protection engineers, managing outage windows, maintaining system continuity, and fielding crews that know the utility's standards — these determine whether a project runs cleanly or creates problems. DeLeo's multi-year IOU contract record reflects consistent execution across all of them. That is why these relationships run across contract cycles, not just single awards.
Underground electrical work inside active utility corridors, substation yards, and fuel terminals requires protection coordination, phased switching plans, and lockout/tagout procedures. DeLeo's crews are trained and cleared to operate in these environments. Field supervision coordinates protection plans with utility operations before any work begins in a restricted zone.
DeLeo self-performs the civil scope and the underground electrical utility scope under one coordination structure. One team, one schedule, one accountability chain — sequencing decisions are made in the field without cross-contractor delay, and the utility construction manager has a single point of contact throughout execution.
IOUs track contractor performance against specific metrics — response time, execution quality, schedule reliability, safety record. DeLeo maintains a 5-year framework contract with United Illuminating (Avangrid) and has performed multi-year programs for Eversource Energy across CT, MA, and RI. These are performance-based renewals, not one-time awards.
DeLeo's operating environments are not greenfield developments. They are urban utility corridors with deep excavations in constrained right-of-way, active substations with energized transmission and distribution equipment, industrial fuel terminals and pipeline sites requiring environmental compliance-driven construction, and aging infrastructure corridors across the densest markets in the Northeast. These environments require permits, sequencing, protection coordination, and field discipline specific to active utility and energy infrastructure work.
CT · NY · NJ · MA · RI
Northeast OperationsIf you are planning underground electrical work, substation civil scope, or energy facility construction in the Northeast — contact DeLeo to discuss scope and fit. We review projects directly, ask the right questions, and respond with straightforward information based on what the work requires.
