[postlink]http://ncmp3.blogspot.com/2011/05/video-manhole-cover-in-detroit.html[/postlink]It's been very wet here in the Detroit area for a few weeks now. So much so that the storm sewers have such a high water flow that pressure gradients significant enough to lift manhole covers have appeared, such as this one:
It's been very wet here in the Detroit area for a few weeks now. So much so that the storm sewers have such a high water flow that pressure gradients significant enough to lift manhole covers have appeared, such as this one: