I40 over I40 / LEATH BAYOU


+35.18000, -90.01778
35°10'48" N, 90°01'04" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:I40 over I40 / LEATH BAYOU
Structure number:79I00400055
Location:06 MI S OF I40-I240 JCT
Purpose:Carries highway over waterway
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:14.1 ft. [4.3 m]
Total length:44.0 ft. [13.4 m]
Owner:State Highway Agency [01]
Year built:1964
Historic significance:Historical significance is not determinable at this time [4]
Design load:MS 18+Mod / HS 20+Mod [6]
Number of main spans:3
Main spans material:Concrete continuous [2]
Main spans design:Culvert [19]
Deck type:Not applicable [N]

Latest Available Inspection: December 2016 

Status:Open, no restriction [A]
Average daily traffic:114,040 [as of 2015]
Truck traffic:11% of total traffic
Structural appraisal:Equal to present minimum criteria [6]
Water adequacy appraisal:Better than present minimum criteria [7]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Channel protection:Bank is beginning to slump. River control devices and embankment protection have widespread minor damage. There is minor stream bed movement evident. Debris is restricting the channel slightly. [6]
Culvert condition:Deterioration or initial disintegration, minor chloride contamination, cracking with some leaching, or spalls on concrete or masonry walls and slabs. Local minor scouring at curtain walls, wingwalls or pipes. Metal culverts have a smooth curvature, non-symmetrical shape, significant corrosion or moderate pitting. [6]
Scour condition:Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Operating rating:48.5 tons [44.1 metric tons]
Inventory rating:35.6 tons [32.4 metric tons]
Sufficiency rating:67.0
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$857,000

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
December 201667.0Not deficient---114040
January 201567.0Not deficient---111150
January 201367.0Not deficient---111600
April 201167.0Not deficient---116720
April 200967.0Not deficient---109770
May 200767.0Not deficient---100850
August 200567.0Not deficient---93390
August 200367.0Not deficient---103920
September 200170.0Not deficient---98550
January 200067.0Not deficient---93840
December 199770.0Not deficient---93710
August 199570.0Not deficient---88100
August 199370.0Not deficient---86210
November 199169.0Not deficient---73570