Lehigh Canal
Lock 4
View south across chamber
4/19/09

Lehigh Canal
Lock 4
Christina Van Gelder observation deck
4/19/09

Lehigh Canal
Lock 4
Old carving on berm wall
4/19/09

Lehigh Canal
Lock 4
Upper end of bypass tunnel
4/19/09

Lehigh Canal
Lock 4
Upper view
4/19/09