Sarah Squire says the council has been "patching" up the promenade for a long time.
Add Yahoo as a preferred source to see more of our stories on Google. Sinkholes form when underground rock dissolves or sediment washes away and the surface collapses. Luis Diaz Devesa/Moment ...
Hosted on MSN
Q&A: Why Philly has so many sinkholes
In early January, a giant sinkhole formed at an intersection in the West Oak Lane neighborhood of North Philadelphia after a water main break. Just two weeks earlier, the city reopened a section of ...
(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Laura Toran is a hydrogeologist and professor emeritus of environmental geology at ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results