ENGINEERING + CONSULTING

TRANSMISSION & DISTRIBUTION EXPERTISE



COMPANY OVERVIEW With a legacy that dates to 1888, Commonwealth is a leader in power and energy, with expertise in transmission & distribution, grid modernization, power generation, renewables, and energy storage. Our top-ranked design firm delivers comprehensive project services from consulting, engineering design, and implementation to commissioning and technical support. At Commonwealth we MAKE A POWERFUL DIFFERENCE. INDUSTRY LEADERSHIP • EC&M Top 20 Electrical Design Firm • Officers and advisors for IEEE, ASCE, and ASME • Licensed in 50 states • Registered Professional Engineers throughout the United States and select Canadian provinces

MARKETS SERVED Commonwealth understands the diverse needs of the power marketplace and serves customers across the spectrum. • Energy & Utilities • Municipalities • Industrial • Institutions | Education • Independent Power Producers & Developers • Federal, State, Local Governments

COMMONWEALTH SERVICES • Strategic Consulting • Project Feasibility Studies • Conceptual Design • Detailed Design • Regulatory & Permitting Support • Owner’s Engineer Services • Construction Phase Engineering • Project Controls, Budgeting & Scheduling • Project Closeout Documentation • Commissioning & Startup Support

COMMONWEALTH OFFICES

TRANSMISSION LINE SERVICES Using the latest in technological tools, we have designed new, expanded, and have upgraded existing facilities with voltage ranges from 4.8 kV to 765 kV. We develop and assess the most advanced overhead, underground, and submarine power delivery systems. • New Line Design & Engineering • Existing Line Rebuild & Upgrade • Structure Relocation • Field Inspection & Condition Assessment • Structural Analysis & Design of Wood, Steel, Concrete, Fiberglass Structures • Clearance Evaluation, Thermal Rating Analysis, NERC Compliance • Conductor Motion Analysis & Mitigation • Material Specification & Management • 3rd Party Attachment Analysis • Siting & Routing • Environmental Permitting & Land Services • Foundation Analysis & Design • For Construction Package Preparation • Contractor Teaming, Submittal Review & EPC Project Delivery • Lattice Tower Analysis & Design • Scoping & Options Development/Analysis • Stakeholder Involvement • Project Cost Monitoring & Forecasting • Resource Management & Schedule Development • Risk Management & Mitigation • Construction Team Coordination • Gate Review Participation/Administration • Staff Augmentation & Peer Review • PLS-CADD, PLS-POLE, PLS-TOWER, FAD/LPILE, SAG10, Auto/CAD, Microstation, Maximo/SAP • Owner’s Engineering

DISTRIBUTION EXPERIENCE We keep your system online and protected by providing the following services: • Conductor, Cable, and Equipment Selection • Structure Design & Detailing • System Layout & Structure Spotting • Structure Application • Conductor Sag Charts • Construction Drawings • Joint Use-5G, Lighting • Use of CYME, ETAP, SKM, CDEGS. PLS CADD • Underground Design: Calculations for Cable Ampacity, Induced Voltage on Cable Shield, Conduit Fill and Jam Ratios, Cable Pulling Tensions • Economic Comparisons • Duct, Manhole, and Tunnel Design • Plan and Profile Drawings • Smart Grid & Microgrid • Protection Settings & Standards • Optimal Recloser Placement • Low-Fault Current Systems and Voltage Regulation • Code expertise for insulated conductors • IEEE grounding, lighting, battery storage, and drone services for pole inspections • SPIDAcalc, PoleForeman, and O-calc



ADDITIONAL SERVICES OFFERED Commonwealth can also provide a wide selection of renewable services, including the following: • Battery Energy Storage Systems • Solar Energy & Microgrid Services • Electric Vehicle Integration • Renewable Natural Gas | Biogas • Wind Capabilities

COMMONWEALTH | ESG Commonwealth is committed to creating a positive impact upon our culture, our communities, and the world. Our environmental, social, and governance (ESG) practices reflect our values. • Since 2019, we reduced annual paper usage by 70% office energy consumption by 28%, and staff miles commuted by 130,000. • Diversity, equity, and inclusion (DEI) initiatives are led by our diversity council and guided by our DEI strategy. Efforts involve outreach, hiring, training, retention, and engagement activities to increase our diverse talent pool and improve the employee experience. • Our new corporate headquarters are optimized for energy efficiency and equipped with LED lighting, occupancy sen sors, and single stream recycling, with plans to inte grate solar panels when the local grid is ready. • Commonwealth’s board is comprised of active employee owners, vested in the sustainability of the organization. They govern with a focus to retain employees, satisfy customers, and uphold the company’s guiding principles.

Commonwealth Contacts: Matt Halmekangas Director of Transmission & Distribution [email protected] 517.990.6789

MAKE A POWERFUL DIFFERENCE.

ENGINEERING + CONSULTING

MAKE A POWERFUL DIFFERENCE.