Top 10 Bridges
1. COOPER RIVER BRIDGE
The biggest name in hurricanes is powerless against the Cooper
River Bridge in South Carolina. The span is designed to withstand wind gusts in
excess of 300 mph. The structure also can withstand without total failure an
earthquake event up to about 7.3 or 7.4 on the Richter scale. With a main span
of 1,546 ft, this will be the longest cable-stayed bridge in the Northern
Hemisphere until the New Mississippi River Bridge is constructed. Total cost:
$531 million.
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2. HOOVER DAM BRIDGE
In the structural world, concrete and steel go together. The
Hoover Dam will have a partner in five years?a steel deck arch bridge.
The span will be 1,900 ft long and 840 ft above water. Geologic mapping and
geotechnical assessment is currently under way, and roadway construction was
scheduled to start in late 2002. Total cost: $231 million (includes road
construction).
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3. U.S. 64/264 MANTEO BYPASS
North Carolina cut the ribbon to its longest bridge back on
Aug. 19. The 5.2-mile bridge, part of the four-lane U.S. 64/264 Manteo Bypass,
will cut 15 miles off travel between Roanoke Island and the north end of Dare
County and improve hurricane evacuation for the Outer Banks. The bridge was
designed as a conventional cast-in-place structure with modified bulb tee
girders. Total cost: $91 million.
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4. I-40 BRIDGE
Tragedy struck Oklahoma this summer when a barge hit the the
I-40 Bridge, killing 14. Three of the piers had to be replaced, cutting off one
of the most vital transportation links in the state. Crews worked 20-hour days
to repair the bridge in less than 47 days. Total cost: $24 million.
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5. HATHAWAY BRIDGE
The old can't handle spring break in Florida. That's why
FDOT has decided to replace the Hathaway Bridge, the only direct link between
Panama City and Panama City Beach, with twin 80-ft-wide segmental concrete box
girder bridges with seven spans of 330 ft. The move should relieve a serious
bottleneck. Total cost: $83 million.
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6. WILLIAM H. NATCHER BRIDGE
Named after a late Kentucky Congressman, the William H.
Natcher Bridge connects U.S. 60 northeast of Owensboro, Ky., with U.S. 231 northeast
of Rockport, Ind. The 4,505-ft-long, four-lane bridge consists of a 1,200-ft
cable-stayed main span and two 500-ft cable-stayed side spans. Total cost: $70
million.
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7. 17TH STREET CAUSEWAY
Called ?Ft. Lauderdale's Signature Bridge,? the
17th Street Causeway comes with a unique aesthetic design that includes 675,000
brick pavers. The span carries four lanes of traffic, two bicycle lanes/outside
shoulders and is 1,908 ft long. Total cost: $68 million.
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8. SMART ROAD BRIDGE
Few have seen a more attractive research project. The Smart
Road Bridge, near Blacksburg, Va., was built to functionally support the
state's Smart Road transportation research project. The state's tallest
bridge?175 ft above the valley floor?is 2,000 ft long and features
cantilever construction with cast-in-place segments and concrete-embedded,
post-tensioned steel cable. Total cost: $17.4 million.
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9. IOWA RIVER BRIDGE
The Iowa Department of Transportation recently won the
Administrator's Environmental Quality Award from the Federal Highway
Administration for work done on the Iowa River Bridge. The span, located in the
Iowa River Greenbelt, established new U.S. records for the longest
total-launched steel bridge and the longest free cantilever. Total cost: $20
million.
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10. BRANDON PARKWAY
Tampa, Fla., has tomorrow in sight. The Brandon Parkway is
the future of highway expansion. This elevated structure will be a precast
concrete segmental box girder bridge with precast segmental piers. Total cost:
$158 million (current bid price).
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