Bhilangna River
The mainstem , "Bhilangna" , rises at the foot of the Khatling Glacier ( elevation ) approximately south of the ice cave at Gaumukh , traditionally considered the source of both the Bhagirathi and the Ganges and flows into the Bhagirathi at Old Tehri , the site of the Tehri dam . 
<triplet> Bhagirathi <subj> Ganges <obj> mouth of the watercourse <triplet> Ganges <subj> Bhagirathi <obj> tributary <triplet> Tehri dam <subj> Bhagirathi <obj> located on terrain feature