Air pressure causes manhole cover to ‘float’ in Phoenix road
August 6, 2016 | 1:36 pm
Aug. 05: A Phoenix resident captured video of a 15-pound manhole cover “floating” in a dance-like rhythm due to underground air pressure from a storm.
Jessie Pena posted a video to Facebook showing the manhole cover in the Coronado Historic District “floating” on the air pressure from a Tuesday evening storm.
Commenters compared the manhole cover’s movements to a dance.
Pena said the manhole cover weighs about 150 pounds. Upi.com