The Badlands Dam

The Petrochem dam is located in the southernmost area of Rancho Coronado, in Night City proper.

Overview
Located in one of the poorest areas of Rancho Coronado, this dam with a large Petrochem logo looks abandoned. Despite still being operational, the reservoir basin lies empty of water and it is instead overran with junk from the neighboring landfill. At some point there was a large quantity of water, as seen from the shore marks along the basin's wall.

It's unknown why it lacks water, though it probably has to do with the basin's pollution. Another dam prevents Laguna Bend from emptying its water here.