The NGT had constituted a committee headed by a former Uttarakhand high court Judge to monitor the project.
The Centre on Thursday told the Supreme Court that if the Army cannot move its missile launchers, heavy machinery up to the northern Indo-China border, then how will it defend it and fight a war, if it breaks out.
The Centre on Tuesday told the Supreme Court that China has made a huge build-up in the Tibet region and the Army needs broader roads to move heavy vehicles up to the India-China border to avoid a 1962 war-like situation.