 The Anaconda Dam (Waterbury), Freight Street Dam (Waterbury), Union City Dam (Naugatuck) and the Platts Mill Dam (Naugatuck) were removed in 1999, while the Kinneytown Dam was bypassed with a fish ladder that same year.The Chase Brass Dam, between Waterbury and Thomaston, was removed in 2004.A fish bypass channel, the first of its kind in New England, now permits fish to migrate past the Tingue Dam and opens an additional of the river to anadromous fish migration.