Structure 22629586900751 · Jefferson County, LA

Palmetto ST over 17 TH Street Canal

Carries Palmetto ST over 17 TH Street Canal, 0.01m North Of Orpheum.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructure8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT199 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 8/9

199 ft end to end: about 3 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 girder bridge.

Built199135 years old
Length199.1 ft60.7 m
Daily traffic1,000counted 1989
Last inspectedMay 2023every 24 months

Location

StateLouisiana
CountyJefferson
Location0.01m North Of Orpheum
CarriesPalmetto ST
Crosses17 TH Street Canal
Coordinates29.97623, -90.12512

Physical Characteristics

MaterialSteel Continuous
DesignGirder and Floorbeam
Total Length199.1 ft (60.7 m)
Max Span199.1 ft (60.7 m)
Deck Width36.1 ft (11 m)
Deck Area667.7 sq m
Main Spans1
Year Built1991

Traffic

Avg Daily Traffic1,000 (1989)
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number022629586900751

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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