Quote:
Originally Posted by flatbutt
Huh I was under the impression that the canal used seawater.
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From what I recall from a 5th grade science project, there's a lake in the middle (Lake Gatun?). Its elevation is greater than sea level. Water from that lake operates the locks on both the Pacific and Gulf sides. The water just "flows" downhill to the sea (via the locks). No seawater is used for operating the locks.