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forelle -> Little Hefren Run (4/15/2008 8:44:36 PM)
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Does anybody have an opinion on this small trib of Tom's run in Clarion county? I know there was acid mine drainage, but I read they installed a passive treatment system back in 2000. I saw a couple of fry up in the headwaters about 5 years ago and was curious to see if quality has improved enough to sustain meaningful native pop.
thanks
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