Now the TMT's board says a site in the Canary Islands, Spain, could act as a potential alternative.
The $1.4bn project will enable experts to study the early Universe and peer into the atmospheres of exoplanets.
It is one of several planned big new telescopes - along with the European Extremely Large Telescope (E-ELT) and space-based James Webb telescope - intended to serve astronomy into the 2020s and beyond.
There is opposition to the 30 meter scope being built onto Mount Kea because of religious and environmental reasons.
After careful deliberation, the board of governors for the 30 meter scope project have identified Observatorio del Roque de los Muchachos (ORM) on La Palma in the Canary Islands, Spain, as the primary alternative to Hawaii.
SOURCE- BBC News