The flooding in the Dhauli Ganga, Rishi Ganga and Alaknanda rivers, which left at least 70 people dead and 125 missing, was caused by a massive rockslide, according to scientific findings released on Friday by International Centre for Integrated Mountain Development (ICIMOD).
According to the report the rockslide and the energy of the fall melted the ice creating the source of flood. The findings said the energy of the fall of about '22 million cubic metres of rock mixed with ice and snow' remobilised the debris and ice on the valley floor deposited by previous events, and pushed the stream water and created an excessive flood wave'.
A bridge was built over Rishiganga to restore connectivity to 13 villages of Uttarakhand’s Chamoli district which had been cut off after a bridge was washed out in the floods on February 7.
The construction of the bridge began on February 25 and it was scheduled to be completed by March 20 but the Border Roads Organisation (BRO) worked overtime to complete it well before schedule.