Anyone who travels I-70 through the mountains is encouraged to phone into our telephone town hall call on Thursday, March 13, at 7 p.m. This call will include information on the traffic impacts associated with this project along with a question and answer session.
To participate, call 877-229-8493 and input the code 111457. The call will last for one hour and you can call in at any time during that hour. The call will be recorded and the audio file posted to this site for those who are unable to call in that evening.
The Westbound I-70 Twin Tunnels project will widen the westbound bore of the tunnel in Idaho Springs to about 53-feet. This will accommodate a third lane along westbound I-70 when the highway is eventually widened. Unlike the recent work done along eastbound I-70 to add a third highway lane from Idaho Springs to the bottom of Floyd Hill, this project will only widen the tunnel to accommodate a future third lane. It does not include expanding westbound I-70 to three lanes at this time.
- In March, eastbound I-70 will be reduced to two lanes of travel so crews can put down temporary pavement in the center median area on both sides of the tunnel to shift westbound traffic into the eastbound lanes.
- In mid to late March there will be minor blasting activity that will require stopping traffic in both directions for about 15 minutes.
- In late March there will be rock scaling work done to remove large rocks from the mountain face above the highway. This work will require stopping traffic in both directions for up to 30 minutes.
- In April, eastbound I-70 traffic will move back onto the detour route around the tunnel and westbound traffic will start moving through the eastbound tunnel.
- Doing this project now saves an estimated $5 million to $7 million because the equipment, resources and detour needed to do the work are already in place.
- With a wider, brighter tunnel entrance, the traffic flow on westbound I-70 will improve as motorists will be less likely to slow down when approaching the tunnel.
- Driver safety will also improve with the removal of rock from the walls above the tunnel portals and along the north side of the highway along the outside each portal.
- This project sets the stage for future westbound I-70 improvements which may use the extra lane for general purpose travel, peak period travel and/or transit.
Current lane closures
I-70 Mountain Corridor