LOCK SILL

SN The masonry beneath a lock gate, sometimes projecting several feet from the gate.
CL MARITIME
BT WATER REGULATION INSTALLATION

 
 

LOCK SILL

SN The masonry beneath a lock gate, sometimes projecting several feet from the gate.
CL TRANSPORT
BT WATER TRANSPORT SITE

 
 

LOCK SILL

SN The masonry beneath a lock gate, sometimes projecting several feet from the gate.
CL WATER SUPPLY AND DRAINAGE
BT WATER REGULATION INSTALLATION