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LA0070 over MISSISSIPPI RIVER

Map

Coordinates:
+30.09622, -90.92200
30°05'46" N, 90°55'19" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:LA0070 over MISSISSIPPI RIVER
Structure number:614704260200721
Location:LA0070
Purpose:Carries highway over highway, waterway, and railroad
Route classification:Other Principal Arterial (Urban) [14]
Length of largest span:825.2 ft. [251.5 m]
Total length:9102.5 ft. [2774.3 m]
Roadway width between curbs:56.1 ft. [17.1 m]
Deck width edge-to-edge:56.8 ft. [17.3 m]
Vertical clearance above deck:15.7 ft. [4.8 m]
Vertical clearance below bridge:131.2 ft. [40.0 m]
Owner:State Highway Agency [01]
Year built:1963
Year reconstructed:2004
Historic significance:Bridge is eligible for the National Register of Historic Places [2]
Design load:MS 18 / HS 20 [5]
Number of main spans:48
Main spans material:Steel [3]
Main spans design:Truss - Thru [10]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Bituminous [6]

Latest Available Inspection: March 2017

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:16,900 [as of 2015]
Truck traffic:9% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Fair [5 out of 9]
Substructure condition:Fair [5 out of 9]
Structural appraisal:Meets minimum tolerable limits to be left in place as is [4]
Deck geometry appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Underclearances appraisal:Equal to present minimum criteria [6]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Channel protection:Banks are protected or well vegetated. River control devices such as spur dikes and embankment protection are not required or are in a stable condition. [8]
Scour condition:Countermeasures have been installed to mitigate an existing problem with scour. [7]
Sufficiency rating:41.8
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:$49,696,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
March 2017FairSatisfactoryFairFair1690041.8
March 2015PoorSatisfactoryPoorFair1690036.8
March 2013PoorSatisfactoryPoorFair1670036.8
July 2011PoorSatisfactoryPoorFair1620048.9
January 2010FairGoodFairSatisfactory1590053.9
May 2007FairGoodSatisfactorySatisfactory1540064.9
May 2005FairVery GoodSatisfactorySatisfactory1650051.9
May 2003FairSatisfactorySatisfactorySatisfactory1600063.9
May 2001FairSatisfactorySatisfactorySatisfactory1427163.9
May 1999FairGoodSatisfactoryGood1427161.9
July 1997FairGoodSatisfactoryGood1401061.9
July 1995FairGoodSatisfactoryGood1281361.9
November 1993FairGoodSatisfactoryGood707161.9
November 1991FairGoodSatisfactoryGood958161.9

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Superstructure
Steel Girder/Beamlinear ft.44,800031,70112,955144
Steel Protective Coatingsq. ft.2,463,45002,450,351013,099
Steel Stringerlinear ft.36,77036,757760
Steel Protective Coatingsq. ft.2,022,43302,022,43201
Deck
Reinforced Concrete Decksq. ft.523,76421,760499,1292,8750
Superstructure
Steel Trusslinear ft.11,0138,9376641,4120
Steel Protective Coatingsq. ft.40040
Steel Floor Beamlinear ft.6,4406,31801220
Steel Protective Coatingsq. ft.191,8110191,6890122
Steel Gusset Plateeach840647121720
Steel Protective Coatingsq. ft.228,1880228,116072
Substructure
Reinforced Concrete Columneach22000
Steel Column Tower/Trestlelinear ft.1,7041,56307764
Steel Protective Coatingsq. ft.161,1500161,0400110
Reinforced Concrete Pier Walllinear ft.4534540800
Reinforced Concrete Abutmentlinear ft.20688101170
Reinforced Concrete Pile Cap/Footinglinear ft.630629010
Steel Pier Caplinear ft.3,3002,578660062
Steel Protective Coatingsq. ft.239,8140239,63212062
Reinforced Concrete Pier Caplinear ft.6058020
Joints
Compression Jointlinear ft.1,398646946400
Open Jointlinear ft.911903080
Assembly without Seal Jointlinear ft.50045222260
Bearings
Movable Bearingeach29514265160
Steel Protective Coatingsq. ft.10,9063,4047,491011
Fixed Bearingeach449449000
Steel Protective Coatingsq. ft.25,32525,325000
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.24,84923,3531,481150