According to an official, the helicopter was about to land but 'drifted away' because of the weather conditions.
Uttarakhand Chief Minister Pushkar Singh Dhami met the two sisters at the VIP ghat. He said General Rawat will forever remain lodged in people's memory.
CDS Rawat, his wife Madhulika and 11 armed forces personnel were killed in the Mi-17V5 helicopter crash near Coonoor in Tamil Nadu on Wednesday.
In CDS Gen Bipin Rawat's death, the country has suffered an irreparable loss as his contribution to the nation was extraordinary, Jnanendra said.
Outstanding soldier, true patriot; India will never forget his exceptional service: PM Modi on Gen Rawat's death
In his condolence message, Modi said he was deeply anguished by the helicopter crash in which Rawat, his wife and other personnel of the armed forces died.
TN Forest Minister K Ramachandran told The New Indian Express that the accident took place because of thick mist engulfing the area
The chopper was on its way from the Sulur IAF base to the Defence Services College (DSC) at Wellington when it crashed.
The dam, where the helicopter crashed, is located about 30 kilometers from Pathankot in Punjab and the lake in which the helicopter crashed is shared by Punjab and J&K governments.
There were no immediate reports of any casualty, he said, adding further details were awaited.