Substations
Leveraging ingenuity, quality, creativity, and engineering expertise, we provide end-to-end services for substation designs that ensure distribution reliability.
Commonwealth designs hundreds of substations yearly for some of the nation’s largest utilities—you will not find more qualified engineers for your substation project.
Your Partner in Substation Engineering and Design
Our expertise ranges from small-scale 2.4 kV distribution substations to large-scale 765 kV bulk transmission facilities. Our services include project management, site layout for grading and drainage, protection and control, structural and ground systems, SCADA and metering systems, equipment specs, control buildings, high voltage insulated cable systems, plan and profile drawings, BOM development, record drawings, microgrids, and more. We help customers develop or adhere to owner standards and perform all scopes of BIM, 3D design, automation, and computer-aided designs.
Our team can act as engineers of record, consultants, or partners in an EPC approach. We deliver seamless concept-to-commissioning services for substation projects. By entrusting us with your project, you can have peace of mind knowing that it will be completed on time and within budget, without any complications.
Related Projects

Greenfield Substation Protection and Control Design
The Duke Energy Kennel Substation project was undertaken to significantly enhance reliability and introduce new circuits to support another station....
View Project Greenfield Substation Protection and Control Design All Projects
Reliable Power Delivery Solutions for Data Centers
Advanced Substation Solutions for Data CentersAt Commonwealth Associates, we take pride in partnering with industry leaders to deliver engineering...
View Project Reliable Power Delivery Solutions for Data Centers All Projects
Southwest Substation Expansion
Location: Southwest, US
Client Type: Utility
Services Provided: Engineering design, environmental due diligence, wetland delineation,...

138 kV Substation Expansion Project in the Midwest
Project Date: 2023Client Type: UtilityRegion: MidwestServices Provided: Comprehensive civil/structural engineering and electrical design for an...
View Project 138 kV Substation Expansion Project in the Midwest All Projects
Anclote Plant - System Protection Redesign and Rebuild
Duke Energy Florida's Anclote Generation Switchyard includes a large coal plant on site. The site has two units of generation. The substation...
View Project Anclote Plant - System Protection Redesign and Rebuild All Projects
Engineering Service Provider for GIS
Client: Mitsubishi Electric Power Products, Inc. (MEPPI)
Location: Midwest, US
Service Categories: Substations, Construction &...

Physical & Electrical Design for Substation Needed for Wind Farm Interconnection
Wind farm substation layoutAvista faced a critical challenge in completing a wind farm substation layout for a generator interconnection project with...
View Project Physical & Electrical Design for Substation Needed for Wind Farm Interconnection All Projects
Greenfield Substation Protection and Control Design
The Duke Energy Kennel Substation project was undertaken to significantly enhance reliability and introduce new circuits to support another station....
View Project Greenfield Substation Protection and Control Design All Projects
Reliable Power Delivery Solutions for Data Centers
Advanced Substation Solutions for Data CentersAt Commonwealth Associates, we take pride in partnering with industry leaders to deliver engineering...
View Project Reliable Power Delivery Solutions for Data Centers All Projects
Southwest Substation Expansion
Location: Southwest, US
Client Type: Utility
Services Provided: Engineering design, environmental due diligence, wetland delineation,...

138 kV Substation Expansion Project in the Midwest
Project Date: 2023Client Type: UtilityRegion: MidwestServices Provided: Comprehensive civil/structural engineering and electrical design for an...
View Project 138 kV Substation Expansion Project in the Midwest All Projects
Anclote Plant - System Protection Redesign and Rebuild
Duke Energy Florida's Anclote Generation Switchyard includes a large coal plant on site. The site has two units of generation. The substation...
View Project Anclote Plant - System Protection Redesign and Rebuild All Projects
Engineering Service Provider for GIS
Client: Mitsubishi Electric Power Products, Inc. (MEPPI)
Location: Midwest, US
Service Categories: Substations, Construction &...

Physical & Electrical Design for Substation Needed for Wind Farm Interconnection
Wind farm substation layoutAvista faced a critical challenge in completing a wind farm substation layout for a generator interconnection project with...
View Project Physical & Electrical Design for Substation Needed for Wind Farm Interconnection All Projects
Greenfield Substation Protection and Control Design
The Duke Energy Kennel Substation project was undertaken to significantly enhance reliability and introduce new circuits to support another station....
View Project Greenfield Substation Protection and Control Design All Projects