Structure 625330411903141 · Tangipahoa County, LA

Larock Road over Natalbany Creek

Carries Larock Road over Natalbany Creek, 0.9 Mi W Of US 51.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 3 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating3/9 · Serious
Substructure4/9 · Poor
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT122 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 3/9 · sets the ratingSubstructure 4/9

122 ft end to end. 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 through truss.

Built195076 years old
Length122.0 ft37.2 m
Daily traffic14counted 2022
Last inspectedAugust 2024every 12 months

Location

StateLouisiana
CountyTangipahoa
Location0.9 Mi W Of US 51
CarriesLarock Road
CrossesNatalbany Creek
Coordinates30.68566, -90.52394

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length122.0 ft (37.2 m)
Max Span122.0 ft (37.2 m)
Deck Width16.4 ft (5 m)
Deck Area186 sq m
Main Spans1
Year Built1950

Traffic

Avg Daily Traffic14 (2022)
Lanes On Bridge1

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical3 — Scour critical
Structure Number625330411903141

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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