Montana-Dakota Utilities (MDU).
11 MI
230KV
RECONDUCTORING
Project overview.
Technology.
After evaluating various options, MDU selected TS Conductor's TS Tern L (819 kcmil) for the final 11 miles of this 65-mile project, replacing the existing 795 ACSR Tern conductor.
Challenges.
Initially, MDU used ACSS conductor for the first 50 miles of the project. However, this traditional approach required retrofitting approximately 90% of the steel structures to accommodate the thermal sag associated with ACSS. The challenge was to find a solution that could increase capacity without necessitating extensive structure modifications.
Key outcomes.
The project utilized standard installation methods and equipment for the TS Conductor portion, eliminating the need for specialized training or tools. This compatibility with traditional practices ensured line worker safety and helped complete the project ahead of schedule.
Increased operating ampacity from 866A to 1532A, a 78% increase.
Avoided all structure modifications on the TS Conductor section, saving approximately 40% on estimated construction costs
Completed the project a full year ahead of schedule, reporting $1.8 million in savings
Achieved a significant reduction in line losses, offering both economic and environmental benefits
