Most canals filled during efforts to remove coal silt (11 fev 1947 ano – 13 dez 1979 ano)
Descrição:
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.Adicionado na linha do tempo:
Data:
11 fev 1947 ano
13 dez 1979 ano
~ 32 years
