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2. Caisson (lock gate) - Wikipedia

   en.wikipedia.org/wiki/Caisson_(lock_gate)

   A caisson is a form of lock gate. It consists of a large floating iron or steel box. This can be flooded to seat the caisson in the opening of the dock to close it, or pumped dry to float it and allow it to be towed clear of the dock. Graving docks at Birkenhead, closed by a variety of ship caissons and floating (sliding) caissons

3. Lock (water navigation) - Wikipedia

   en.wikipedia.org/wiki/Lock_(water_navigation)

   The boat enters the lock. 8–9. The boat enters the lock. 3. The lower gates are closed. 10. The upper gates are closed. 4–5. The lock is filled with water from upstream. 11–12. The lock is emptied by draining its water downstream. 6. The upper gates are opened. 13. The lower gates are opened. 7. The boat exits the lock. 14. The boat exits ...

4. Caisson lock - Wikipedia

   en.wikipedia.org/wiki/Caisson_lock

   The caisson lock is a type of canal lock in which a narrowboat is floated into a sealed watertight box and raised or lowered between two different canal water levels. It was invented in the late 18th century as a solution to the problem posed by the excessive demand for water when conventional locks were used to raise and lower canal boats ...

5. I Built Harbor Freight's Garage in a Box—Here's How ... - AOL

   www.aol.com/built-harbor-freights-garage-box...

   Harbor Freight's 17-by-10-foot carport is one possible answer. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ways to reach us. Sign in. Mail. 24/7 Help. For ...

6. St. Lawrence Seaway - Wikipedia

   en.wikipedia.org/wiki/St._Lawrence_Seaway

   The Eisenhower Locks in Massena, New York St. Lawrence Seaway St. Lawrence Seaway separated navigation channel near Montreal. The St. Lawrence Seaway (French: la Voie Maritime du Saint-Laurent) is a system of locks, canals, and channels in Canada and the United States that permits oceangoing vessels to travel from the Atlantic Ocean to the Great Lakes of North America, as far inland as Duluth ...

7. Floating dock (impounded) - Wikipedia

   en.wikipedia.org/wiki/Floating_dock_(impounded)

   In 1715 the first commercial wet dock, Liverpool's Old Dock, opened. [2] Early docks were of simple construction: a single lock gate isolating them from the tidal water. The gates were opened during the last hour [or two] of the rising tide, giving a short window of opportunity to let ships in on the rise and releasing outgoing ships while the tide was on the t