After trifurcation of the department during the year 1995, it started functioning with one circle at Rupa and five divisions at Seppa, Poma, Yingkiong, Roing and Changlang. Thereafter, three more circles and nine new divisions along with some sub-divisions have been created for providing an effective administration and smooth functioning of the department. The department is headed by a Chief Engineer at the headquarters with four circles, fourteen civil divisions, three mechanical divisions, thirty-seven civil sub-divisions and one mechanical sub-division.
The Department also has three soil and water testing laboratories located at Naharlagun, Rupa and Namsai. Moreover, the State Land Use Board (SLUB) is attached with this Department, and is headed by a Director with the rank of Senior Engineer, functioning from Naharlagun.
STATE LAND USE BOARD (SLUB) - PERCEPTION & PERSPECTIVE
Ministry of Agriculture, Govt. of India called upon the state governments in May 1974 to set up State Land Use Boards as the apex bodies to provide the highest forum for policy planning and coordination in all matters related to healthy and scientific management of land resources. With the passage of time, the boards were setup accordingly in most of the states, followed by revitalization and strengthening in 1987. In Arunachal Pradesh the SLUB was constituted during 1986-87 under chairmanship of honorable Chief Minister.
The board has been engaged in carrying out the most important work of Soil and Land Use Survey through out the state. Land Resource Survey reports of Ranganadi Catchment, East Kameng, Lohit, Tirap, Changlang, East Siang, West Siang, Tawang, Dibang Valley, Status Report on Drinking water quality of Arunachal Pradesh and a part of Lower Subansiri district (Now Papumpare District) were published. The fieldwork of remaining districts i.e. Upper Subansiri, West Kameng and Lower Subansiri have been completed and reports under preparation. In addition, the board has done other studies in collaboration with central Govt. organizations viz. NBSS&LUP (ICAR) Nagpur, NRSA Hyderabad, IIRS Dehradun etc. in the area of Land Resource Management.
The important projects completed so far as are Land Use/ Land Cover Mapping, Hydrogeomorpholocial studies, Soil Resources Mapping, Land Resource Mapping, Agro ecological Zones, Soil Moistures Regime, Soil Temperature Regime, Land Degradation Studies of the entire state etc.