Structure E1129 · Box Elder County, UT

I-84 (sr-84) over Farm Road Underpass

Carries I-84 (sr-84) over Farm Road Underpass, 19 Mi. North Of Tremonton.

Overall conditionFair

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

How ratings work
Culvertsets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT29 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 6/9

A culvert 29 ft across. 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.

Built1959rebuilt 1973
Length29.2 ft8.9 m
Daily traffic12,370counted 2022
Last inspectedApril 2023every 24 months

Location

StateUtah
CountyBox Elder
Location19 Mi. North Of Tremonton
CarriesI-84 (sr-84)
CrossesFarm Road Underpass
Coordinates41.87306, -112.46611

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length29.2 ft (8.9 m)
Max Span26.9 ft (8.2 m)
Deck Area206.5 sq m
Main Spans1
Year Built1959 (reconstructed 1973)

Traffic

Avg Daily Traffic12,370 (2022)
Truck Traffic53%
Lanes On Bridge4
Lanes Under Bridge2

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number0E1129

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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