Answer: susquehanna

AnswerCrossword Clue
SUSQUEHANNAChesapeake Bay feeder
SUSQUEHANNAPennsylvania river
SUSQUEHANNARiver into Chesapeake Bay
SUSQUEHANNARiver flowing through New York, Pennsylvania and Maryland, to Chesapeake Bay
SUSQUEHANNAThree Mile Island is in it