Structure 53104510525101 · Lincoln County, LA

Norris RD over I 20

Carries Norris RD over I 20, 3.5 Mi East Of La 145m.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT402 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

402 ft end to end, longest span 70 ft: about 6 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.

Built1960rebuilt 1993
Length401.9 ft122.5 m
Daily traffic3,620counted 2015
Last inspectedDecember 2023every 24 months

Location

StateLouisiana
CountyLincoln
Location3.5 Mi East Of La 145m
CarriesNorris RD
CrossesI 20
Coordinates32.52997, -92.45410

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length401.9 ft (122.5 m)
Max Span69.9 ft (21.3 m)
Deck Width29.5 ft (9 m)
Deck Area1102.5 sq m
Main Spans8
Year Built1960 (reconstructed 1993)

Traffic

Avg Daily Traffic3,620 (2015)
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number053104510525101

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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