St. Lawrence Seaway, Iroquois Lock

Front:
ONTARIO MONTREAL LOC NEW YORK Coo Le IROQUOIS LOCK le Sr La SEQUENCE OF OPERATIONS • TRAFFIC CONTROLLER NOTIFIES VESSEL BY RADIO WHEN TO ENTER LOCK. SHIP ENTERS LOCK AND IS SECURED TO SOUTH WALL BY FOUR WIRE CABLES. •FENDER BOOMS ARE LOWERED (THESE FENDERS PROTECT THE SECTOR GATES AND BRIDGE.) • SECTOR GATES ASTERN ARE CLOSED. • SECTOR GATES AHEAD ARE OPENED SLIGHTLY AND SLOWLY FOR A SHORT TIME TO ALLOW WATER LEVELS TO BE BALANCED. SECTOR GATES ANEAD ARE FULLY OPENED. •FENDER BOOMS ARE RAISED. TOWER OPERATOR INFORMS LOCKMASTER EVERYTHING IS FULLY OPENED AND CLEAR. •LOCKMASTER ADVISES SHIP TO SLACKEN CABLES AND THEY ARE CAST OFF. SHIP SLOWLY PROCEEDS OUT OF LOCK. NORMAL LIFT OF LOCK. LENGTH BETWEEN FENDERS WIDTH OF LOCK DEPTH OF WATER OVER GATE SILLS. MINIMUM DEPTH OF CHANNEL LARGEST SHIP WHICH CAN PASS THROUGH LOCKS 0.5 TO 6 FEET 768 FEET 80 FEET 30 FEET 27 FEET 730 FT.LONG 75 FT.IN BEAM 25.5 FT.IN DRAUGHT SUCH SHIPS CAN CARRY 27000 TONS OF ORE OR 1000000 BUSHELS OF GRAIN. LOCK IS REQUIRED FOR SHIPS TO BY-PASS IROQUOIS DAM WHICH CONTROLS THE LEVEL OF LAKE ONTARIO. EXTRA SET OF SECTOR GATES LOCATED AT EACH END OF LOCK ARE REQUIRED IN CASE OF ACCIDENT TO OPERATING GATES. THE ST LAWRENCE SEAWAY AUTHORITY SEVEN MEN TO A LOCK CREW. L0CKS ARE MANNED AROUND THE CLOCK SEVEN DAYS A WEEK.

Back:
PRINIEOMA ST. LAWRENCE SEAWAY Iroquois Lock, Iroquois, Ontario, Canada Large sign at the Lock, giving detailed information on the Seaway. 4¢ DIST. BY CORNWALL NEWS DISTRIBUTORS LIMITED, CORNWALL, ONTARIO, CANADA S-1297 MADE IN CANADA GRANT-MANN