"Dave S" wrote in message
nk.net...
... I live on the gulf coast, and pretty much the vast majority are 200
feet or less. Crossing a major ship channel, or the mississippi, you may
find them up to 500 feet agl though, to allow ships to pass under.

Dave

Clearances above water:
Golden Gate Bridge, 220 feet

Brooklyn Bridge 135 feet at mid-span

George Washington Bridge 64.62 meters (212 ft) at mid-span

San Francisco-Oakland Bay Bridge 220 feet (67 m) (west span) 191 feet (58 m)
(east span)

Mackinac Bridge 155 ft (47 m)

What later became known as the Crescent City Connection was the second
bridge to span the Mississippi south of Baton Rouge after the Huey P. Long
Bridge a few miles up river from the city, and the first bridge across the
river in New Orleans itself. 51.8 meters (170 feet)

Ambassador Bridge and Blue Water Bridge (both run between Michigan and
Ontario over the Detroit and St. Claire Rivers respectively) are both 152
feet above the water.

source: en.wikipedia.org

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Geoff
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