While the Borders Roads Organization wants a shorter 4.5km tunnel under the 5,091 metre pass on the existing road alignment readied by 2024, the NHIDCL prefers an elaborate 13.5km tunnel and a new road to secure the shortest route on Manali-Darcha-Padun-Nimmu-Leh axis.
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A year after the People’s Liberation Army (PLA) transgressed into Gogra-Hot Springs and Pangong Tso area of eastern Ladakh, the Union defence ministry is on the verge of deciding the
alignment of strategic Nimmu-Padum-Darcha road to feed supplies to Indian military formations in Ladakh sector. The new alignment will be the third axis to Ladakh and will be least exposed to the adversary as compared to Srinagar-Zoji La-Kargil axis
Key to this new alignment is a proposed tunnel under 16,703-feet Shingo or Shinkun La, which gets snowed in and blocks traffic movement during at least three winter months. Situated on the border between Himachal Pradesh and Ladakh, the high mountain pass has snow round-the-year with BRO constructing motorable roads on both sides of the pass.
According to geology study conducted by Snow and Avalanche Study Establishment on behalf of the BRO, the Manali based institute recommended three options of constructing tunnels to obviate the pass. The first option was a 4.25km tunnel located at an distance of 36.5km from Darcha (99 km stone on Manali-Sarchu road). The north portal of the proposed tunnel is 41km from Darcha. The other two proposed options are 7km tunnel and a 13.81km tunnel.
For the BRO, the 4.25km tunnel is a preferred option as it addresses the most difficult portion of the road and remaining road could be kept open with snow clearance effort and some avalanche structures. The time for construction of this tunnel, which is already on the road axis, will be three working seasons and the road-tunnel will be completed by 2024.
According to BRO, this option offers the best gradient, least overburden and least support requirements with Afcons, who constructed the Atal Tunnel, moving their equipment to build the tunnel under Shinkun la on a war footing.
Please explain this in simple words
In negotiations we should never believe what CCP says. If they say that they will withdraw gradually, it generally means that they are planning something else, we need to be vigilant.