March 20, 2017: 

A Request for Qualifications is issued

September 13, 2017: 

Three proponents are announced to have qualified in the Request for Qualifications (RFQ) process.

December 5, 2017: 

A Request for Proposals is issued to the three proponents that were selected through the Request for Qualifications process.

October 26, 2018: 

An environmental assessment is completed. The regulatory and permitting phase begins.

November 13, 2018: 

The GNWT announces a preferred proponent.

September 2019: 

Construction starts.

November 30, 2021: 

The new Tłı̨chǫ Highway opens to the public.