▁studied ▁several ▁times . ▁It ▁was ▁studied ▁by ▁the ▁United ▁States ▁Ge ological ▁Survey ▁from ▁ 1 9 7 1 ▁to ▁ 1 9 7 5 , ▁by ▁Daniel s ▁( working ▁for ▁the ▁Pennsylvania ▁Fish ▁and ▁Bo at ▁Commission ) ▁in ▁ 1 9 7 6 , ▁by ▁R ider ▁and ▁Black sm ith ▁( working ▁for ▁the ▁Pennsylvania ▁Department ▁of ▁Environment al ▁Prote ction ) ▁in ▁ 1 9 8 5 , ▁by ▁Cop eland ▁( working ▁for ▁the ▁Pennsylvania ▁Fish ▁and ▁Bo at ▁Commission ) ▁in ▁ 1 9 9 2 , ▁by ▁Mo ase ▁( working ▁for ▁the ▁Pennsylvania ▁Fish ▁and ▁Bo at ▁Commission ) ▁in ▁ 1 9 9 3 , ▁and ▁Po pp ▁and ▁McG url ▁in ▁ 2 0 0 3 . ▁The ▁stream ▁is ▁on ▁the ▁Pennsylvania ▁Department ▁of ▁Environment al ▁Prote ction ▁Bureau ▁of ▁Ab andon ed ▁Mine ▁Rest oration ' s ▁priority ▁list ▁for ▁rest oration . ▁ ▁Bi ology ▁The ▁d rain age ▁bas in ▁of ▁Spring ▁Brook ▁is ▁designated ▁as ▁a ▁High - Qual ity ▁Cold water ▁Fish ery ▁and ▁a ▁Mig rat ory ▁Fish ery ▁from ▁its ▁head w aters ▁down stream ▁to ▁the ▁N ortheast ▁Ext ension ▁of ▁the ▁Pennsylvania ▁Turn pi ke ▁( Inter state ▁ 4 7 6 ). ▁From ▁that ▁point ▁down stream ▁to ▁its ▁mouth , ▁the ▁d rain age ▁bas in ▁of ▁the ▁stream ▁is ▁designated ▁as ▁a ▁Cold water ▁Fish ery ▁and ▁a ▁Mig rat ory ▁Fish ery . ▁Wild ▁tr out ▁naturally