[2] Near Pharwala Fort, Ling stream, following a relatively long course through Lehtrar and Kahuta, joins the Soan near Sihala on the southern side of Village Gagri.

After following a path along a big curve, the stream reaches the Kalabagh proposed Dam Site close to Pir Piai where it falls into the Indus River.

[3] The marine life of the river are currently endangered due to the discharge of chemicals of the Sihala Industrial State and effluent water of Rawalpindi city into it.

[4][better source needed] The oldest evidence of human activity in Pakistan has been found in the Soan River valley.

[5] Some relics found in the Soan Valley area during the excavation process are believed to have originated over 500,000 years ago, during the Stone Age.