Phase I Construction – First Tunnel

  • Implement and monitor performance of construction-related mitigation efforts
  • Implement Maintenance of Traffic Plan
  • Install Phase I temporary street decks to maintain traffic access across construction trenches
  • Remove existing surface features, such as paving and sidewalks, in the enclosed construction zone
  • Partial demolition of existing tunnel between 2nd and 3rd Streets
  • Construction of first new tunnel adjacent to south side of existing tunnel
  • Backfilling excavation to cover first new tunnel structure
  • Installation of track bed ballast, railroad tracks, railroad signals and communications equipment in first new tunnel
  • Open first new tunnel to train traffic