Troutlover, the reason Bullshead can maintain it's water levels now is because water is sent downstream in a pipe as opposed to the open creek bed. The amount of evaporation from the creek was huge, and therefore a vast amount of water was removed from the reservoir. Today, there is actually more people being served with less water loss. The effeciency of this water transfer leaves us with year round fishing. The irrigation districts are now looking at piping water in a lot of areas that used to run open ditches. It makes sense, but there will be quite a bit of "man-made" habitat lost along these areas where water used to flow through the Alberta "desert".