Structure 611702583201621 · East Baton Rouge County, LA

La3064 over I-12

Carries La3064 over I-12, 0.6 Mi N Of I-10.

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 FT635 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

635 ft end to end, longest span 70 ft: about 1.8 football fields. 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.

Built196759 years old
Length634.8 ft193.5 m
Daily traffic33,927counted 2021
Last inspectedJuly 2023every 24 months

Location

StateLouisiana
CountyEast Baton Rouge
Location0.6 Mi N Of I-10
CarriesLa3064
CrossesI-12
Coordinates30.41634, -91.09809

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length634.8 ft (193.5 m)
Max Span69.9 ft (21.3 m)
Deck Width60.0 ft (18.3 m)
Deck Area3541.1 sq m
Main Spans12
Year Built1967

Traffic

Avg Daily Traffic33,927 (2021)
Truck Traffic9%
Lanes On Bridge4
Lanes Under Bridge6

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number611702583201621

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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