GUWAHATI, June 2 – The National Hydroelectric Power Corporation (NHPC) today agreed to explore the scope of reducing the height of the dam of the Lower Subansiri Hydroelectric Power Project (LSHEP), considering the hydroelectric and economic constraints.
The NHPC will submit a report on the scope of reducing the dam height to the Central Water Commission (CWC) and the Commission, together with the IIT Guwahati will jointly review the report.
These were some of the decisions arrived at by the experts belonging to the State, the NHPC and the CWC at a meeting convened by State’s Power Commissioner and Secretary Anurag Goel at the NEDFi House here today.
According to sources in the State’s expert group, after the review of the NHPC’s report, it would be discussed by the State’s expert group and all other stakeholders. Other downstream-related issues of the project would be considered after resolving the issues linked with dam height and dam safety, said the sources in the expert group.
Prof Arup Sarma of the IIT Guwahati, a member of the State’s expert group told this newspaper that the experts present at the meeting were of the opinion that the IIT Guwahati should undertake academic studies to investigate the practical viability of the downstream regulating pond in any hydroelectric project in general for minimising the diurnal variations. This type of pond was originally proposed by Prof Sarma and accepted by the international scientific community.
NHPC Executive Director Rakesh told this newspaper that the State’s experts were told by the NHPC that the dam of the project has already been re-designed and all the recommendations of the State’s experts were adopted. The technical queries of the State’s experts were also answered by the NHPC at the meeting.
On the issue of reducing the height of the project’s dam, the State’s experts were told that the height of the dam was worked out to meet the flood moderation requirement. If the dam height is reduced, it would affect the flood moderation capacity of the dam, Rakesh said.
The meeting was attended by KM Garg, Member, Hydro of the Central Electricity Authority, CWC Directors S K Sibbal and NN Rai, Roorkee IIT’s ML Sarma, NHPC’s Director, Technical DP Bhargava, special invitees AK Mitra, ex-secretary, Water Resources Department, Assam, Dr NK Choudhury, ex- Vice Chancellor, Gauhati University, SN Phukan, ex-CMD NEEPCO and the State’s experts Prof Jatin Kalita, Prof BP Duarah, Prof AK Bhagaboti, Prof Arup Kumar Sarma, Prof Chandan Mahanta, Prof SK Biswas, Prof JN Sarma and Professor Sarbeswar Kalita.