File:SenecaAqueduct.JPGDescriptionSenecaAqueduct.JPG English: Seneca Aqueduct, near Poolesville, Maryland, USA. Built in 1833 to bring the C&O Canal over Seneca Creek. Riley's
File:Seneca Creek 2.jpgw:Seneca Aqueduct and Riley's Lock. Just after passing under the aqueduct, the creek flows into the Potomac River. The aqueduct and bridge were constructed
File:Seneca Aqueduct.jpgDescriptionSeneca Aqueduct.jpg English: The Seneca Aqueduct, built 1828-1833, carries the C&O Canal over Seneca Creek. It is a unique structure: the only