Structure 625204540410066 · St. Tammany County, LA

I0012 Ramp A over US 190

Carries I0012 Ramp A over US 190, 2.6 M W Of La 59.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure and Substructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT368 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

368 ft end to end, longest span 95 ft: about 5 semi-trucks nose to tail. Lengths and the semi-truck on the deck are drawn to the same scale. 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 girder bridge.

Built197650 years old
Length368.1 ft112.2 m
Daily traffic9,838counted 2021
Last inspectedAugust 2023every 24 months

Location

StateLouisiana
CountySt. Tammany
Location2.6 M W Of La 59
CarriesI0012 Ramp A
CrossesUS 190
Coordinates30.43043, -90.08400

Physical Characteristics

MaterialSteel
DesignGirder and Floorbeam
Total Length368.1 ft (112.2 m)
Max Span95.1 ft (29 m)
Deck Width28.2 ft (8.6 m)
Deck Area964.9 sq m
Main Spans4
Year Built1976

Traffic

Avg Daily Traffic9,838 (2021)
Truck Traffic26%
Lanes On Bridge1
Lanes Under Bridge4

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number625204540410066

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.

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