The Cunningham-Elmont Project replaced the 500 kilovolt (500kV) high-voltage line between the Cunningham and Elmont substations. The line, placed into service in the 1960s, was nearing the end of its useful life and needed to be replaced with new equipment to meet current standards.



  • Reduced the risk of a major failure
  • Improved local and regional reliability
  • Increased existing line capacity by approximately 66%
  • Economic benefits to local communities:
    • Incremental increase to local property taxes
    • Employees and contractors supported local businesses during construction
  • No New Right of Ways Required


  • Approximate total line length is 51 miles
  • Typical structure description – each single-circuit steel lattice structure was replaced with new, single-circuit steel lattice structure that is on average approximately 25-feet taller. View typical structure diagram comparisons.

Route Map

SCC Approval Process

The State Corporation Commission (SCC) is responsible for determining the need, route and environmental impact of transmission lines at 138 kV and above in Virginia.

Frequently Asked Questions