National Grid Pratts Junction Substation

Location: Sterling, Massachusetts
Owner: National Grid
Client: Black and Veatch

Project Summary

Upgrade the existing substation to meet the thermal capacity of both the 230kV and 115kV substations. Work included all new 230kV and 115kV aluminum bus, structures, breakers, and disconnects in the 230/115kV substation, as well as replacement of the existing 115kV main cable busses #1 and #2 within the substation. Control wiring to the new equipment was also upgraded to meet NERC requirements for a bulk power substation.


Manage the coordination and execution of 24 power outages in four phases over a one-year period.


State Electric managed all outages seamlessly and delivered the project ahead of schedule.

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