Structure 614704260200721 · St. James County, LA

La0070 over Mississippi River

Carries La0070 over Mississippi River, La0070.

Overall conditionFair

Set by its lowest-rated component: Superstructure and Substructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating5/9 · Fair
Substructuresets the rating5/9 · Fair
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
9,102 FT OVERALL2,000 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 5/9 · sets the rating

9,102 ft end to end, longest span 825 ft: about 25 football fields, or 1.7 miles. Lengths are drawn to scale; at this length a semi-truck would be a speck. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a through truss.

Built1963rebuilt 2004
Length9102.0 ft2774.3 m
Daily traffic17,100counted 2016
Last inspectedAugust 2024every 24 months

Location

StateLouisiana
CountySt. James
LocationLa0070
CarriesLa0070
CrossesMississippi River
Coordinates30.09625, -90.92198

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length9102.0 ft (2774.3 m)
Max Span825.1 ft (251.5 m)
Deck Width56.8 ft (17.3 m)
Deck Area47995.4 sq m
Main Spans48
Year Built1963 (reconstructed 2004)

Traffic

Avg Daily Traffic17,100 (2016)
Truck Traffic9%
Lanes On Bridge4
Lanes Under Bridge6

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is eligible for the National Register
Scour Critical7 — Countermeasures installed
Structure Number614704260200721

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

Nearby Bridges