I was a smoker for over 40 years, so I don't smell much, but I can smell the odor from the water on the other side of the cofferdam, shown above. This is a difficult post to write, because both the construction company and the city say there's no leak, no problem. I can tell you that the water on the northern end of the trench, shown above, is greenish and putrid. Water on the southern end of the trench, being dug for a new storm sewer line, is much cleaner and doesn't smell. I can tell you that the green putrid water is being pumped out by a long hose, across the creek, where it is being treated by a large filter device, just south of the amphitheater stage. It is my fear that perhaps a sanitary sewer line was either nicked in the excavation, or a previously leaking line was unearthed. As an advocate for the parks, I feel compelled to shine a light on this situation, awkward as it may be. If my fear is unfounded, which I hope it is, my apology to any offended parties. The Allentown drinking water is taken from that creek, about a mile downstream. UPDATE: Both the title and text of this post have been revised. UPDATE Wednesday July 17, 2013: Further inquires indicate that there is NOT a sewage leak. I hope to be able to write a separate, conclusive correction to this post in the near future.