Substation Design

Substation Design

Substation Design

We work on thousands of projects small to large, from 2.4 kV distribution substations to 765 kV bulk transmission facilities. Our substation design services are many and varied, from site layout for grading and drainage to commissioning services to applications of owner standards, computer designs, prefabricated buildings and packaged control houses stations. We can do it all. We’ll provide the engineer/procure/construct (EPC) services. You can sit back and trust the project will be completed on time, on budget and without complication.

We’d love to see how we can support your project needs. Contact us today.

This service was applied to the following solution(s):

Relocation of NIPSCo Electric Transmission Lines for Airport Expansion

Gary/Chicago International Airport Authority (“the Airport”) was required by the Federal Aviation Administration (FAA) to obtain additional airspace in their runway approach corridor for runway expansion. This necessitated relocation of…

Garden Peninsula Wind Farm 34.5/138 kV Substation and Transmission Line Design

Heritage Sustainable Energy hired Windemuller, Inc., to assist with their $75M Garden Wind project, located in Delta and Schoolcraft counties in Michigan’s Upper Peninsula. Commonwealth designed a new 13-mile-long 138…

Northeast Reliability Interconnect

This project began as the 84-mile-long second 345 kV tie to New Brunswick stretching from Orrington Substation near Orrington, Maine, to an interconnection with New Brunswick Power at a point…

We are committed, both as a firm, and as individuals to influencing and shaping the secure energy future.

Gary Bernstein, P.E.
Vice President & Chief Marketing Officer

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Commonwealth consultants are here to help guide you and formulate a plan to allow your company to play a larger role. read more

Planning & Studies

Commonwealth experts can help you have an optimal plan for future energy sources and actions to take to keep your energy sources updated. read more


The list of projects is distinguished and varied, with each project having a unique solution. read more