Alarmed at dumping of muck along the banks of the Sutlej river, top brass of Bhakra Beas Management Board (BBMB) perhaps no more shares the optimism of the National Thermal Power Corporation (NTPC) that completion of Kol Dam will extend the life of Bhakra Dam by 18 years. The muck dumped along the right and left banks of the Sutlej poses a serious threat to the Gobindsagar reservoir, which has been silting at a rapid pace.