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Louis B. Ruediger | Tribune-Review Wendell Haag, a research fisheries biologist from the U.S. Forest Service, places a concrete silo housing baby mussels in the Clairon River last week. The baby mussels will be collected this fall and examined for quality of health and growth that will give researchers a better understanding of the quality of the water. Haag’s national study of mussels includes twelve rivers and streams in western Pennsylvania and 13 other states. Louis B. Ruediger | Tribune-Review Fisheries biologist from the U.S. Forest Service Wendell Haag shows a cluster of baby mussels before being placed in Tionesta Creek last week. Haag’s national study of mussels includes 12 rivers and streams in Western Pennsylvania and 13 other states. The baby mussels will be collected this fall and examined for quality of health and growth that will give biologists a better understanding of the quality of the water.

Allegheny riverUnited statesMahoning riverMahoning creekSandy creekDunkard creekBeaver riverClarion riverFrench creekShenango riverTionesta creekLittle mahoning creekTen mile creekEric chapmanUs forest serviceBoat commission