Please note that the project schedule is subject to change.

  • Fourth Quarter 2017: Installation of security fencing and demolition of existing structures at the substation site
  • Second Quarter 2018: Grading activities to begin
  • Second through Third Quarter 2018: Wall and foundation construction
  • Second Quarter through Fourth Quarter 2018: Underground transmission line construction
  • Fourth Quarter 2018 through First Quarter 2019: Underground transmission line cable installation
  • Fourth Quarter 2018 through Third Quarter 2019: Substation electrical equipment installation and testing
  • Mid-2019: Substation construction complete and in-service
  • Third Quarter through Fourth Quarter 2019: Installation of landscaping

View the latest Thornton Substation construction updates.