Structure 40833010934591 · Bossier County, LA

Mccance RD over Posten Bayou

Carries Mccance RD over Posten Bayou, 6.0 Mi N Of HWY 537.

Overall conditionPoor

Set by its lowest-rated component: Deck at 4 of 9.

How ratings work
Decksets the rating4/9 · Poor
Superstructure5/9 · Fair
Substructure5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT137 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 5/9Substructure 5/9

137 ft end to end, longest span 15 ft. 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.

Built198838 years old
Length137.1 ft41.8 m
Daily traffic90counted 2020
Last inspectedDecember 2024every 12 months

Location

StateLouisiana
CountyBossier
Location6.0 Mi N Of HWY 537
CarriesMccance RD
CrossesPosten Bayou
Coordinates33.01860, -93.76516

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length137.1 ft (41.8 m)
Max Span15.1 ft (4.6 m)
Deck Width26.2 ft (8 m)
Deck Area334.4 sq m
Main Spans9
Year Built1988

Traffic

Avg Daily Traffic90 (2020)
Lanes On Bridge2

Inspection & Ownership

Last InspectionDecember 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical3 — Scour critical
Structure Number040833010934591

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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