East Siang, May 1:
The Border Affairs Department has commenced joint interstate boundary surveys along the Arunachal Pradesh–Assam border, starting Thursday in Lower Siang and East Siang districts. The exercise is being conducted in coordination with the Government of Assam and the Survey of India.
According to the department, the survey will also begin in Lower Dibang Valley from May 1. The initiative is being carried out in a phased, stretch-wise manner, with districts in Arunachal Pradesh paired with corresponding districts in Assam, including Dhemaji and Tinsukia.
The survey aims to achieve an amicable and scientific demarcation of the interstate boundary using geospatial coordinates and on-ground verification.
In East Siang district, the survey commenced in the Oyan/Jampani area, involving teams from East Siang and Dhemaji, along with officials from the Survey of India. Authorities reported that the process began smoothly without any issues. A similar exercise has been initiated in Lower Siang district as per the approved plan. In Lower Dibang Valley, survey activities are underway in coordination with the Tinsukia administration.
In the Lower Siang–Dhemaji sector, the survey covers three stretches spanning approximately 56.57 km. Work will begin in Stretch 2 (Telam area westwards), followed by Stretch 3 in the Likabali area, and finally Stretch 1 under the Nari circle.
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| Survey teams and officials interacting on-ground during interstate boundary demarcation exercise. |
The East Siang–Dhemaji sector includes two stretches. The first stretch runs from the geospatial point 95.371533°/27.848558° in the Oyan–Ruksin area up to the Depi river along the Lower Siang boundary, followed by the second stretch.
In the Lower Dibang Valley–Tinsukia sector, two stretches, Parbuk and Paglam, cover approximately 58.23 km. The Parbuk stretch survey is being led by the Parbuk SDO, while the Paglam stretch is under the supervision of the Paglam SDO.
The department also referenced earlier survey work conducted in the Pakke-Kessang sector in March 2026. By April 4, all border pillars established during that survey were re-observed on the ground in the presence of officials from both states and the Survey of India. This was described as a key milestone in the demarcation process.
Authorities have appealed to residents, especially those living in border areas, to cooperate with survey teams to ensure the smooth completion of the exercise.
