Tempe Town Lake

Tempe Town Lake is an artificial perennial reservoir located just north of Tempe Butte at the confluence of the intermittent Salt River and the ephemeral Indian Bend Wash in Tempe, Arizona, United States. The reservoir receives much of its water from the Colorado River via the Central Arizona Project.

On July 20, 2010, a portion of the west side of the dam that contained the water in the lake collapsed, sending a flood of water into the Salt River and draining the lake.

Source: Wikipedia