Structure 41600000040254 · De Soto County, LA

Us0171 over Trenton Rd. Rr

Carries Us0171 over Trenton Rd. Rr, 6.1 Mi. N.of La 512.

Overall conditionGood

Set by its lowest-rated component: Substructure at 7 of 9.

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT762 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

762 ft end to end, longest span 110 ft: about 2.1 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.

Built200917 years old
Length762.1 ft232.3 m
Daily traffic5,659counted 2021
Last inspectedJune 2023every 24 months

Location

StateLouisiana
CountyDe Soto
Location6.1 Mi. N.of La 512
CarriesUs0171
CrossesTrenton Rd. Rr
Coordinates31.94900, -93.71915

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length762.1 ft (232.3 m)
Max Span109.9 ft (33.5 m)
Deck Width42.3 ft (12.9 m)
Deck Area2996.7 sq m
Main Spans10
Year Built2009

Traffic

Avg Daily Traffic5,659 (2021)
Truck Traffic18%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number041600000040254

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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