Structure 22629519900121 · Jefferson County, LA

Harvey BLVD over Trapp Canal

Carries Harvey BLVD over Trapp Canal, 0.45 Mi. E. Of Manhattan.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT171 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

171 ft end to end, longest span 19 ft: about 2 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 slab bridge.

Built198442 years old
Length170.9 ft52.1 m
Daily traffic6,000counted 1989
Last inspectedFebruary 2023every 24 months

Location

StateLouisiana
CountyJefferson
Location0.45 Mi. E. Of Manhattan
CarriesHarvey BLVD
CrossesTrapp Canal
Coordinates29.86119, -90.03966

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length170.9 ft (52.1 m)
Max Span19.0 ft (5.8 m)
Deck Width35.1 ft (10.7 m)
Deck Area557.5 sq m
Main Spans9
Year Built1984

Traffic

Avg Daily Traffic6,000 (1989)
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number022629519900121

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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