If Darien wants to fix all of its flooding issues across town, it may have to face a nearly $10 million price tag to do it. A drainage study conducted by Tighe & Bond and posted on the town’s website last month revealed a too-small, easily overwhelmed pipe and channel system serving the Grove Street and the Tilley Pond area as well as their $3.4 million recommended replacement. The results come right on the heels of a similar study into the Salt Box Lane neighborhood, which, based on Tighe & Bond’s recommendations, would cost $6.4 million to fix. Drainage near downtown consists of a combination of underground piping and open channels collecting water from sources including Tilley Pond, commercial businesses south of the Metro-North Railroad and residences on West Avenue and Squab Lane. The most critical areas for flooding were Grove Street Plaza and the West Avenue parking lot, the latter of which sits at a low point between Tilley Pond and the railroad.
https://www.stamfordadvocate.com/news/article/darien-tilley-pond-flooding-3-4m-18291286.php