Structure 625204501803101 · St. Tammany County, LA

I0010 over La 433

Carries I0010 over La 433, 8.8 Mi NE Of US 11.

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 FT220 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

220 ft end to end, longest span 70 ft: about 3 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 multi-beam bridge.

Built196660 years old
Length220.1 ft67.1 m
Daily traffic82,860counted 2021
Last inspectedAugust 2023every 24 months

Location

StateLouisiana
CountySt. Tammany
Location8.8 Mi NE Of US 11
CarriesI0010
CrossesLa 433
Coordinates30.24733, -89.76340

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length220.1 ft (67.1 m)
Max Span69.9 ft (21.3 m)
Deck Width45.9 ft (14 m)
Deck Area939.4 sq m
Main Spans2
Year Built1966

Traffic

Avg Daily Traffic82,860 (2021)
Truck Traffic26%
Lanes On Bridge3
Lanes Under Bridge6

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 Number625204501803101

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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