Stepping Down the St. Lawrence

— History of the Coast —

How Does a Lock Work? 1) A) Filling valve opened. Emptying valve closed. B) Water enters by gravity. Gate closed. Ship waiting to enter. C) Chamber fills to upstream level. D) Attendant opens gate. Catch cable lowered. 2) A) Attendants tie off ship. B) Filling valve closed. C) Emptying valve opens. D) Water empties by gravity. 3) A) Water equals down stream level. B) Downstream gates open. Filling valve closed. Emptying valve open. C) Ship departs. A Tight Fit. Lock Cross Section. Navigators must thread their massive ships into a space that is only slightly larger than the ship's beam (width.) Lock Facts Filling Time: 7 Minutes Emptying Time: 7 Minutes Time in Lock: 20 Minutes Gallons of Water: 22 Million Ships Raised/Lowered: 42 feet Ocean and lake vessels are raised and lowered from the Atlantic Ocean to Lake Superior by locks. Ships from 50 different countries pass through this lock transporting goods around the globe. Profile of the St. Lawrence Seaway Lake Superior, Lake Michigan, Lake Huron, Lake Erie, Lake Ontario, Lake St. Lawrence, The Eisenhower Lock, Lake St. Francis, Lake St. Louis, Tidewater Section The Seaway connects the interior U.S. and Canadian markets to the world Seaway Trail, Inc., Corner Ray & West Main St., Sackets Harbor, NY 13685, 1-800-SEAWAY-T. This exhibit made possible by a grant from FHWA to Seaway Trail, Inc.

Sorry, but we don't have a picture of this historical marker yet. If you have a picture, please share it with us. It's simple to do. 1) Become a member. 2) Adopt this historical marker listing. 3) Upload the picture.

Show me all markers in:  Massena, NY  |  St. Lawrence County  |  13662  |  New York  |  United States of America

Lost Villages of the St Lawrence
The Empire State
Dedicated to All Members of the U.S. Armed Forces
Site of First School in Massena
In Memory of Those Who Made the Supreme Sacrifice
The Rev. John Strachan in Cornwall
Cornwall Canal
The Founding of Cornwall
War of 1812
United Empire Loyalists

• GPX
• KML
• LOC

Have you seen this marker? If so, check in and tell us about it.