Construction & Schedule

Clearing and Grading:

  • The construction phase begins with clearing the designated route of vegetation and obstructions.
  • Grading the corridor ensures a smooth and even terrain for the transmission line infrastructure.
  • ITC takes care to minimize the impact on the natural environment during this process and restores any disturbed areas after construction.

Foundation and Structure Installation:

  • Skilled construction crews begin by installing the foundations for the transmission structures. These foundations provide a stable base to support the weight and tension of the transmission lines.
  • ITC uses advanced engineering techniques to ensure that the structures are appropriately positioned and anchored securely to withstand weather events and loads.

Transmission Line Construction:

  • Transmission structures are carefully constructed along the designated route.
  • Expert teams handle the installation, ensuring precise alignment and safe construction practices.
  • The transmission line’s height is carefully determined to avoid potential obstacles and maintain safe clearances. The height will be approximately between 120 ft – 160 ft

Conductors and Insulators:

  • High-quality conductors, chosen for their conductivity and durability, are strung between the transmission structures.
  • Insulators are installed to prevent electricity from grounding through the structures and to maintain safe electrical isolation.

Crossings and Obstacles:

  • In cases where the transmission line needs to cross rivers, roads, or other obstacles, ITC uses specialized engineering techniques.
  • Crossings are designed to ensure structural integrity and prevent any interference with existing infrastructure.
  • Transmission line routes are designed from Station A to Station B using a variety of factors.  Road right of way and existing utility corridors are considered.

Substation Construction:

  • With the engineering plans, permits and equipment in place, construction work would begin. This involves site preparation, foundation construction, and equipment installation.
  • The substation undergoes comprehensive testing to ensure that all systems are functioning correctly and safely. Once the testing is successful, the substation is commissioned and integrated into the power grid.
  • The substation requires ongoing monitoring, maintenance, and management to ensure reliable electricity transmission.

Safety Measures:

  • Safety is a top priority 
  • Construction crews follow strict safety protocols and receive regular safety training.
  • Measures are implemented to protect both workers and the public during construction.

Environmental Mitigation:

  • ITC takes measures to minimize environmental impact during the construction process.
  • This includes controlling erosion, managing stormwater runoff, and implementing sediment control measures.
  • ITC collaborates with environmental experts to protect sensitive habitats and wildlife in the vicinity of the project.

Community Engagement:

  • ITC maintains open communication with local communities during construction.
  • Regular updates and outreach initiatives keep residents informed about the progress and potential temporary disruptions.

Timelines and Completion:

  • The construction phase timeline is carefully planned to ensure efficient progress.
  • ITC aims to complete the construction within the projected timeframe, considering various factors like weather conditions and unforeseen events.
  • In Ionia, Eaton, Clinton, and Gratiot counties, approximately 40 miles of new 345kV line will be built from Oneida Substation in Grand Ledge to Nelson Road substation in Carson City.
    • Construction is scheduled to begin Q1 2028 and be completed by Q4 2028.
  • From northern Indiana into Michigan through Branch and Calhoun counties, ITC will be making infrastructure improvements by building approximately 50 miles of new transmission lines from the Indiana border to the new Helix Substation in Calhoun County.
    • This will be the first new interstate connection to Michigan’s transmission system in nearly 50 years.
    • Construction is scheduled to begin on Helix substation in Q4 2025 and be completed by Q3 2026.
    • Line building will start Q1 2029 and end Q4 2030.

The construction phase of building new transmission lines requires meticulous planning, skilled labor, and a strong focus on safety and environmental stewardship. ITC’s commitment to these principles ensures a reliable and efficient power delivery system for the benefit of the community and the region.