TV News from Denver reported that a 3rd bore is being opened for the Eisenhower which takes I-70 under the Continental Divide.
Blasting begins tomorrow and traffic will be halted periodically as the work continues.
Then later toward April traffic will be rerouted on a detour.
CDOT website:
http://www.cotrip.org/roadConditions.htm
On the right hand section click on "Road Work Alerts"
When considering alternate routes possible delays on this one should be considered.