Structure 70230522925551 · Allen County, LA

Arkadelphia RD over Six Mile Creek Relief

Carries Arkadelphia RD over Six Mile Creek Relief, 3.9 Mi West Of La 377.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure and Substructure at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructuresets the rating5/9 · Fair
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT78 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 5/9

78 ft end to end, longest span 20 ft. Lengths and the car 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.

Built197551 years old
Length78.1 ft23.8 m
Daily traffic260counted 2019
Last inspectedAugust 2023every 24 months

Location

StateLouisiana
CountyAllen
Location3.9 Mi West Of La 377
CarriesArkadelphia RD
CrossesSix Mile Creek Relief
Coordinates30.86888, -92.92592

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length78.1 ft (23.8 m)
Max Span20.0 ft (6.1 m)
Deck Width22.0 ft (6.7 m)
Deck Area159.5 sq m
Main Spans4
Year Built1975

Traffic

Avg Daily Traffic260 (2019)
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number070230522925551

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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