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Atchafalaya Basin Bridge

St. Martin Parish, Louisiana
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Description 

These twin bridges span the entire Atchafalaya Basin. Built in the early 1970s, these bridges are two of the longest, and most-heavily traversed bridges in the state of Louisiana. NBI has them broken into 4-mile segments; the length in feet is approximate for the entire structure.

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Facts 

Overview
Pair of 16+ mile bridges over the Atchafalaya Basin on I-10
Location
St. Martin Parish, Louisiana
Status
Open to traffic
History
Built 1971
Design
Stringer
Dimensions
Total length: 85,000.0 ft. (16.1 mi.)
Deck width: 40.0 ft.
Approximate latitude, longitude
+30.33230, -91.75897   (decimal degrees)
30°19'56" N, 91°45'32" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/619297/3356260 (zone/easting/northing)
USGS topographic map
Cecilia
Inventory number
BH 46720 (Bridgehunter.com ID)
Inspection (as of 09/2010)
Deck condition rating: Satisfactory (6 out of 9)
Superstructure condition rating: Satisfactory (6 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Sufficiency rating: 92.9 (out of 100)
Average daily traffic (as of 2011)
24,540

Categories 

Beam (6,057)
Built 1971 (55)
Built during 1970s (495)
Have street view (9,909)
I-10 (9)
Louisiana (519)
 Open (28,322)
Over a mile long (192)
Owned by state (9,811)
St. Martin Parish, Louisiana (13)
Total length over 2500 feet (587)

Update Log 

  • October 29, 2010: Updated by Cliff Darby: Edited Description
  • October 28, 2010: Updated by Cliff Darby: Updated Information

Sources 

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