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Transmission Engineering & Design

End to End Reliability

Overhead, Underground, or Anywhere in Between. We Have You Covered.

As power demands continue to grow across various industries, the need for reliable transmission capacity becomes increasingly crucial. Whether you’re planning to build new greenfield transmission lines or upgrade existing facilities, our experienced team is equipped to deliver innovative solutions quickly and cost-effectively.

At NEI, our transmission team brings extensive experience working with a diverse range of clients on projects spanning from distribution level to 500kV. We have successfully executed overhead transmission projects using various structure types, including but not limited to: concrete, fiberglass, steel, and wood. Additionally, we have completed various stages of underground transmission projects, from feasibility studies to design and construction. No project is too large, too small, or too complex for us to handle.

The team at NEI recognizes that every project and client have different needs and constraints, which require unique solutions and project approaches. At NEI we strive to understand the “why” behind the project, and partner with our clients to navigate project challenges. Our goal is to provide best-in-class transmission solutions to keep the lights on. We understand the details without missing the big picture.




Overhead Transmission Line Design

  • Line Modeling Using PLS-CADD
  • Advanced Structural Analysis and Optimization
  • Using LiDAR to Analyze and Model Existing Lines
  • Upgrading Analysis and Design
  • Conductor Selection
  • Line Reconductoring Using ACSS or ACCC
  • Line Reliability and Condition Assessment
  • Standards Development
  • Fiber Optic Additions
  • Loading Criteria Studies
  • Siting and Routing Selection
  • Root Cause Failure Analysis and Forensic Investigation
  • Environmental Impact Statements
  • Right of Way Services
  • Electrical System Studies
  • Reliability-Centered Maintenance Programs

Underground Transmission Line Design

  • Environmental Impact Statements
  • Evaluation of Cable System Types
  • Alternative Routing Identification and Analysis
  • Sizing of Cable and Conduit
  • Cable Pulling Calculations
  • Location and Design of Vaults
  • Ampacity and Loss Calculations
  • Heat Dissipation Considerations

Additional Services & Software

  • Fire Mitigation
  • RFP Development
  • Corrosion Studies
  • Expert Witness Testimony
  • Distribution Design & PLS-CADD Modeling
  • FE Analysis
  • PLS-CADD Optimum Spotting Tool
  • MFAD
  • L-Pile
  • Forensic Analysis
  • Root Cause Failure Analysis

Featured Tech Paper

Developing Design Wind Speeds for Transmission and Distribution Lines in Belize and Accounting for Climate Change

This report develops an evidence-based strength and loading standard for the country of Belize to use with future power line infrastructure

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