Morningside Park has had a bad leak for the better part of a year. The earliest photo above is from February 13th but the leak began before then. Week after week I'd climb the stairs at 116th Street only to be met with a mysterious stream of water. Week after week I'd take a few pictures and muttered that somebody ought to do something. Week after week I'd forget to report the problem. Sigh.
The flow was strong enough in the cold weather that the stream did not freeze. Since either side of the stream was ice that meant the only safe place to walk was in the water. In spring the stream filled up with pollen. In the summer there was all sorts of organic matter and algae growth in the stream.
The stream would flow down the trail and cascade down the middle set of stairs. Usually the waterfall would disappear after a few steps only to reappear at the bottom of the stairs. Sometimes, though, it was water all the way down.
On the Sunday after I returned from San Francisco there was a carefully arranged medial moraine of leaves and an abundance of caution tape near the source of the leak. This past Sunday there was a trench and the leak had stopped. Thank you leak fixer!