Which dam supplies drinking water to Islamabad and Rawalpindi?

Which dam supplies drinking water to Islamabad and Rawalpindi?

اسلام آباد اور راولپنڈی کو پینے کا پانی کونسا ڈیم فراہم کرتا ہے؟
Explanation

The Khanpur Dam is located on the Haro River in Pakistan.

The dam is situated near the city of Khanpur, in the province of Punjab.

It was completed in 1983.

The dam is used for irrigation, water supply, and hydroelectric power generation.