Structure 3F 514 · Box Elder County, UT

I-15 (sr-15) Sbl over Sr-102

Carries I-15 (sr-15) Sbl over Sr-102, West Of Tremonton.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT136 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

136 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 multi-beam bridge.

Built199036 years old
Length136.2 ft41.5 m
Daily traffic14,686counted 2023
Last inspectedApril 2023every 24 months

Location

StateUtah
CountyBox Elder
LocationWest Of Tremonton
CarriesI-15 (sr-15) Sbl
CrossesSr-102
Coordinates41.71139, -112.19278

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length136.2 ft (41.5 m)
Max Span133.9 ft (40.8 m)
Deck Width44.0 ft (13.4 m)
Deck Area556.1 sq m
Main Spans1
Year Built1990

Traffic

Avg Daily Traffic14,686 (2023)
Truck Traffic35%
Lanes On Bridge2
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 Number3F 514

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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