Commonwealth’s dedicated engineers, designers, drafters, right-of-way experts, environmental specialists, and project managers partner with customers and other stakeholders to deliver successful T&D system improvements time and again.
Trusted by some of the largest utility companies across the country for decades, Commonwealth’s T&D expertise spans from 4.8 kV to 765 kV and encompasses challenging terrains; overhead and underground transmission lines; wood, steel, concrete, and fiberglass structures; and projects ranging from single structure replacements to 100+ miles in length.
On typical greenfield and rebuild projects, we deliver project planning and scoping, route selection and permitting, stakeholder coordination, conceptual design studies, detail engineering and design, bills of material, construction specifications, contractor selection, and technical construction support.
On the Distribution side, Commonwealth offers expertise in:
- Conductor, cable, and equipment selection
- Structure design & detailing
- System layout & structure spotting
- Conductor sag charts
- Construction drawings
- Joint use-5g, lighting
- Underground design: calculations for cable ampacity, the induced voltage on cable shield, conduit fill and jam ratios, cable pulling tensions
- 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
- IEEE grounding, lighting, battery storage, and drone services for pole inspections
On the Transmission side, Commonwealth offers expertise in:
- Planning & Scoping
- Siting & Routing
- Environmental & Land services
- Field Inspection & Asset Condition Assessment
- Structural Analysis & Design (Wood, Steel, Lattice, Concrete, and Fiberglass Structures)
- Foundation Design
- Clearance Evaluation, Thermal Rating Analysis, NERC Compliance
- Conductor Motion Analysis & Mitigation
- Third-Party Attachment Analysis
- Material Specifications & Management
We are proficient in PLS-CADD, PLS-POLE, PLS-TOWER, FAD/LPILE, SAG10, AutoCAD, MicroStation, CYME, ETAP, SKM, CDEGS, and more.
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