I-80/I-380 construction

Project Schedule

Construction Activities

This is a high-level overview of different phases of the project. This project schedule is subject to change. Activities listed below are anticipated to begin during the following periods:

July 2017 through 2018 (State Fiscal Year 2018 funding)

  • Clearing and grubbing as needed for later utility relocations – ONGOING
  • Begin utility relocations – ONGOING
  • Grading project north of Highway 6 on the west side of I-380 (coordinated with Forevergreen Road interchange grading and utility relocations) – COMPLETE
  • Refer to the Forevergreen Road page for coordinated Forevergreen Road work – ONGOING


July 2018 through 2020 (State Fiscal Year 2019 funding)

  • Clearing and grubbing as needed for grading.
  • Continued utility relocations.
  • Grading in the southwest quadrant (including relocated county roads, bridge approach embankments).
  • Grading in the northeast quadrant; bridge approach embankment.
  • Construction on the eastbound to northbound and on the eastbound to southbound bridges. These bridges are planned to be completed in two years.
  • Nighttime shoulder strengthening and widening work. Preliminary work needed for traffic staging.
  • Widening of eastbound I-80 bridge over Clear Creek.
  • Refer to the Forevergreen Road interchange for coordinated Forevergreen Road work and schedule.


July 2019 through 2020 (State Fiscal Year 2020 funding)

  • Clearing and grubbing as needed for grading.
  • Continued utility relocations.
  • Grading occurs project wide.
  • Construction on the I-380 median bridges and U.S. 218 median bridge over future ramp.
  • Grading and paving for the roadway in the median of I-380.
  • Construction on the I-80 bridges - widenings over U.S. 6 and the railroad.
  • Construction on pier for future southbound I-380 to eastbound I-80 ramp bridge.
  • Nighttime shoulder strengthening and widening work to prepare for future traffic shifts and future staging.
  • I-380 and ramp bridges over Clear Creek.
  • Box culvert extensions.
  • Temporary median pavement (crossovers) for staging traffic.
  • Demolition of existing Park Road Bridge in mid to late summer 2020.


OCTOBER 2020 THROUGH 2023 (STATE FISCAL YEARS 2021 THROUGH 2023 FUNDING)

  • New lanes on I-80 and I-380
  • I-380 widening from near U.S. 6 to approximately 1.2 miles north of Forevergreen Road
  • Construction of remaining I-80 bridges over Clear Creek and over future ramp
  • Grading and paving of various ramps
  • Staged grading and staged bridge construction on I-380; new bridge approaches
  • Construction of various ramp bridges
  • Staged grading and staged bridge construction on I-80; new bridge approaches
  • Final I-80 and I-380 stormsewer, shoulder and barrier work
  • Construction of new Park Road Bridge over I-80, anticipated in 2023
  • Final signing, lighting, message boards, painting
  • Final erosion control and seeding is anticipated in 2024.