Keywords: Seneca Aqueduct Rileys Lock 24 from HABS.tif en Seneca Aqueduct in 1936 before collapse looking downstream when it still had gates HABS says 1 Historic American Buildings Survey John O Brostrup Photographer September 16 1936 11 20 A M VIEW FROM SOUTHWEST OF AQUEDUCT - Chesapeake Ohio Canal Lock 24 Riley's Lock Road Seneca Montgomery County MD http //www loc gov/pictures/item/md0873 photos 082758p/resource/ LOC-image hhh md0873 Historic American Buildings Survey September 16 1936 11 20 A M MD-16-29 39 07861 -77 33944 Seneca Aqueduct |