Structure 80604000002446 · Grant County, LA

Fdr 556 over Creek

Carries Fdr 556 over Creek, Logmi 0.90 Fr 546 To.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
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 FT31 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

31 ft end to end, longest span 15 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.

Built196066 years old
Length30.8 ft9.4 m
Daily traffic34counted 1979
Last inspectedOctober 2022every 24 months

Location

StateLouisiana
CountyGrant
LocationLogmi 0.90 Fr 546 To
CarriesFdr 556
CrossesCreek
Coordinates31.75556, -92.60731

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length30.8 ft (9.4 m)
Max Span15.1 ft (4.6 m)
Deck Width16.1 ft (4.9 m)
Deck Area46.1 sq m
Main Spans2
Year Built1960

Traffic

Avg Daily Traffic34 (1979)
Lanes On Bridge1

Inspection & Ownership

Last InspectionOctober 2022
Inspection FrequencyEvery 24 months
OwnerU.S. Forest Service
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number080604000002446

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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