Before revision: In this Pennsylvania scheme , however, two rivers, a large river, the Susquehanna and a smaller one, the Schuylkill were to be improved by clearing channels through obstructions and building dams where needed.
After revision: In this Pennsylvania plan, , however, two rivers, a large river, the Susquehanna and a smaller one, the Schuylkill were to be improved by clearing channels through obstructions and building dams where needed.