He said the snow was more than 20 feet high in some stretches close to the Baralacha Pass, posing a big challenge to those clearing the snow.
The route is crucial to the movement of the armed forces and their supplies and wares to forward areas in Ladakh.
The BRO maintains the strategic highways in the country.
A Himachal Road Transport Corp official told IANS here that it would take at least a week to restart the bus service between Delhi and Leh via Manali and Keylong once the highway was opened to traffic.
The Rohtang Pass -- the main tourist attraction located 52 km from here -- has already been opened for tourists after snow clearance.
Only 1,200 taxi or private vehicle permits -- 800 petrol vehicles and the remaining diesel -- are issued online daily on a first-come-first-served basis to visit the Rohtang Pass.
Earlier, a permit was available online on payment of Rs 550 through the district administration's website.
On every Tuesday, when the BRO repairs the Rohtang road, vehicles are not allowed to go beyond the Gulaba barrier from the Manali side.
The idyllic settings of the Himalayas draw an increasing number of backpackers, especially foreigners, for adventure activities like mountain biking, rock climbing and jungle trekking.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)