Share:

LA3094 over TWELVE MILE BAYOU

Map 

Coordinates:
+32.52633, -93.77992
32°31'35" N, 93°46'48" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.

Facts 

Name:LA3094 over TWELVE MILE BAYOU
Structure number:040900250900911
Location:.9 MI NORTH OF LA 173
Purpose:Carries highway over waterway
Route classification:Other Principal Arterial (Urban) [14]
Length of largest span:75.1 ft. [22.9 m]
Total length:571.9 ft. [174.3 m]
Roadway width between curbs:57.7 ft. [17.6 m]
Deck width edge-to-edge:68.6 ft. [20.9 m]
Skew angle:30°
Owner:State Highway Agency [01]
Year built:1968
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Main span material:Steel [3]
Main span design:Girder and floorbeam system [03]
Deck type:Concrete Cast-in-Place [1]

Latest Available Inspection: June 2017 

Good/Fair/Poor Condition:Poor
Status:Open, no restriction [A]
Average daily traffic:11,100 [as of 2015]
Truck traffic:3% of total traffic
Deck condition:Fair [5 out of 9]
Superstructure condition:Poor [4 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]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Better than present minimum criteria [7]
Channel protection:Bank protection is being eroded. River control devices and/or embankment have major damage. Trees and rush restrict the channel. [5]
Pier/abutment protection:Navigation protection not required [1]
Scour condition:Countermeasures have been installed to mitigate an existing problem with scour. [7]
Operating rating:42.5 tons [38.6 metric tons]
Inventory rating:32.8 tons [29.8 metric tons]
Sufficiency rating:60.2
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:$3,375,000

Previous Inspections 

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
June 201760.2PoorFairPoorFairSD11100
June 201558.2PoorFairPoorFairSD11100
June 201458.8PoorFairPoorFairSD10800
July 201358.7PoorFairPoorFairSD11000
February 201358.6PoorFairPoorFairSD11200
February 201261.5PoorSatisfactoryPoorSatisfactorySD14400
February 201161.6PoorSatisfactoryPoorSatisfactorySD14200
February 201061.6PoorSatisfactoryPoorSatisfactorySD14000
February 200962.1PoorSatisfactoryPoorSatisfactorySD12700
January 200862.1PoorSatisfactoryPoorSatisfactorySD12700
February 200762.2PoorSatisfactoryPoorSatisfactorySD12600
March 200662.4PoorSatisfactoryPoorSatisfactorySD12100
January 200562.4PoorSatisfactoryPoorSatisfactorySD12100
February 200462.3PoorSatisfactoryPoorSatisfactorySD12200
February 200361.9PoorSatisfactoryPoorSatisfactorySD13400
May 200161.2PoorSatisfactoryPoorSatisfactorySD15214
April 200061.2PoorSatisfactoryPoorSatisfactorySD15214
February 200063.1PoorSatisfactoryPoorSatisfactorySD10197
April 199963.1PoorSatisfactoryPoorSatisfactorySD10197
January 199863.1PoorSatisfactoryPoorSatisfactorySD10197
February 199762.3PoorSatisfactoryPoorSatisfactorySD12304
February 199662.5PoorSatisfactoryPoorSatisfactorySD12182
January 199562.6PoorGoodPoorSatisfactorySD12061
January 199463.3PoorGoodPoorSatisfactorySD10074
January 199380.2FairGoodFairSatisfactory-10074
February 199279.2FairGoodFairSatisfactory-10074