Structure 625202690702991 · St. Tammany County, LA

La0040 over Morgan Branch

Carries La0040 over Morgan Branch, 1.0 M E Of La 1077.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT77 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

77 ft end to end, longest span 19 ft. 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 or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built195472 years old
Length77.1 ft23.5 m
Daily traffic3,755counted 2021
Last inspectedOctober 2023every 24 months

Location

StateLouisiana
CountySt. Tammany
Location1.0 M E Of La 1077
CarriesLa0040
CrossesMorgan Branch
Coordinates30.61791, -90.20140

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length77.1 ft (23.5 m)
Max Span19.0 ft (5.8 m)
Deck Width26.2 ft (8 m)
Deck Area188 sq m
Main Spans4
Year Built1954

Traffic

Avg Daily Traffic3,755 (2021)
Truck Traffic12%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number625202690702991

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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