Structure 35004500614298 · St. Martin County, LA

I0010 over Ramp B. Off Ramp

Carries I0010 over Ramp B. Off Ramp, 5.66 Mi W Of La 975.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 3 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating3/9 · Serious
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT253 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 7/9Substructure 3/9 · sets the rating

253 ft end to end, longest span 64 ft: about 4 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.

Built197155 years old
Length253.0 ft77.1 m
Daily traffic970counted 2021
Last inspectedAugust 2024every 12 months

Location

StateLouisiana
CountySt. Martin
Location5.66 Mi W Of La 975
CarriesI0010
CrossesRamp B. Off Ramp
Coordinates30.34258, -91.72262

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length253.0 ft (77.1 m)
Max Span64.0 ft (19.5 m)
Deck Width24.0 ft (7.3 m)
Deck Area562.8 sq m
Main Spans4
Year Built1971

Traffic

Avg Daily Traffic970 (2021)
Truck Traffic22%
Lanes On Bridge1

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number035004500614298

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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