Big Tree Substation Updates

O'Connell started work as the Prime Contractor at Big Tree Substation in September, 2020. Crews have made significant progress and the project is expected to be completed sometime in 2022.

NYSEG’s “customers first” mindset emphasizes making continual investments in their systems and grid infrastructure. Big Tree Substation serves nearly 4,000 customers in the region, and this project will help ensure that they can continue to deliver safe and reliable electric service for years to come. Work includes expanding four acres of the existing substation located in Orchard Park, NY. Crews rebuilt the existing station as a three-bay breaker and a half arrangement connecting to National Grid Line 151. Work includes installation of storm water management features, establishing a temporary lay down/staging area and marshaling yard, temporary access to the site from the north, modification and relocation of seven existing 115 kV and 34.5 kV poles and electric lines in the vicinity of the new expansion. O’Connell self-performed the installation of the following:

– Erection of A frame steel for the overhead strain bus – Support steel with overhead 5” aluminum pipe bus – 65’ and 85’ lightning mast – 115 kV and 34.5 kV disconnect switches – 115 kV circuit breakers – 115 kV and 34.5 kV cabling – Installation/build-out of the control house – Installation of all foundations, cable trench, control cables & lighting – Relocation of the existing 115 kV/34.5 kV poles & overhead lines – Relocation of two existing transformers and capacitor banks – Testing of all equipment and cables

DIVISION: Power Group PROJECT MANAGER: Tom Sweeney FOREMAN: Tim German, LU 86