Structure 4D 619 · Box Elder County, UT

I-84 (sr-84) Wbl over Sr-83

Carries I-84 (sr-84) Wbl over Sr-83, Howell Jct Interchange.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT157 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

157 ft end to end, longest span 60 ft: about 2 semi-trucks nose to tail. 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 tee-beam bridge.

Built195967 years old
Length157.2 ft47.9 m
Daily traffic12,109counted 2023
Last inspectedApril 2023every 24 months

Location

StateUtah
CountyBox Elder
LocationHowell Jct Interchange
CarriesI-84 (sr-84) Wbl
CrossesSr-83
Coordinates41.81694, -112.41194

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length157.2 ft (47.9 m)
Max Span60.0 ft (18.3 m)
Deck Width44.3 ft (13.5 m)
Deck Area646.6 sq m
Main Spans3
Year Built1959

Traffic

Avg Daily Traffic12,109 (2023)
Truck Traffic51%
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 Number4D 619

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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