The Middle Deschutes River should be a great habitat for trout and other fish, but because of temperature and flow issues, there are not nearly as many fish as there could be. The Upper Deschutes Watershed Council "has done a study that shows high flows from Tumalo Creek can cool down the Middle Deschutes. For example, on one day in June 2006, 170 cubic feet per second, or cfs, of 52-degree water from Tumalo Creek flowed into Deschutes River, which was at 102 cfs and 67 degrees. The water downstream of the convergence was 59 degrees." (http://waterwatch.org/pressroom/press-clips/piping-project-could-help-fish-return-to-middle-deschutes).
Diagram of Water Rights on the Creek
It is clear that keeping water in Tumalo Creek has real value, so why didn't the City of Bend take environmental impacts into account during its decision-making process?