St.
Catharines (2001 population 129,170; metropolitan population
377,009, 2006 estimated population 134,996) is the largest
city in the Niagara Region in southern Ontario, Canada,
with 97.11 square kilometres (37.5 sq mi) of land. MORE... |
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On
navigable waterways, a lock is a particular type of
device for raising or lowering boats between stretches
of water at different levels. The distinguishing feature
of a lock is a fixed chamber whose water level can be
varied; whereas in a boat lift or inclined plane. MORE...
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