Most canals filled during efforts to remove coal silt (11 feb 1947 año – 13 dic 1979 año)
Descripción:
Excursion vessels and pleasure boating remained active on the Schuylkill Navigation until most of the canals were filled by the Commonwealth of Pennsylvania during 1947–1979 in efforts to remove coal silt from the Schuylkill River.Añadido al timeline:
fecha:
11 feb 1947 año
13 dic 1979 año
~ 32 years
