Gangrel Dam officially the Pandit Ravishankar Sagar is located in Chhattisgarh, India.

It is the longest & largest dam in Chhattisgarh.

This dam supplies year round irrigation, allowing farmers to harvest two crops per year and key water supplier of Bhilai Steel Plant.

The dam also supplies 10 MW of hydro-electric power capacity.

[citation needed] Onakona is a popular tourist spot located on the banks of the reservoir.