Originally Posted by
fatsbucknut
http://www.emappa.dep.state.pa.us/emappa/viewer.htm
This is a program we use at work. It will tell you if the stream is a warm water, cold water or exceptional value stream. It will also tell you the name. This can help you narrow it down from warm water - suckers,carp,etc to exceptional value which are either wild trout or a tributary to a wild trout stream.
I'll add it to my "favorites".