Structure 625230288900661 · St. Tammany County, LA

W. 19th AVE over Mile Branch

Carries W. 19th AVE over Mile Branch, 0.4 Mile East Of Johnson.

Overall conditionGood

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

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT35 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 35 ft across with 3 openings. 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, so those are drawn as typical for a culvert.

Built199036 years old
Length35.1 ft10.7 m
Daily traffic300counted 1989
Last inspectedJanuary 2025every 24 months

Location

StateLouisiana
CountySt. Tammany
Location0.4 Mile East Of Johnson
CarriesW. 19th AVE
CrossesMile Branch
Coordinates30.47804, -90.10986

Physical Characteristics

MaterialSteel
DesignCulvert
Total Length35.1 ft (10.7 m)
Max Span9.8 ft (3 m)
Deck Width55.1 ft (16.8 m)
Deck Area179.8 sq m
Main Spans3
Year Built1990

Traffic

Avg Daily Traffic300 (1989)
Lanes On Bridge2

Inspection & Ownership

Last InspectionJanuary 2025
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical9 — Foundation above flood level
Structure Number625230288900661

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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