Most canals filled during efforts to remove coal silt (11 feb 1947 anni – 13 dic 1979 anni)
Descrizione:
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.Aggiunto al nastro di tempo:
Data:
11 feb 1947 anni
13 dic 1979 anni
~ 32 years
