Structure F 769 · Utah County, UT

Sr-77 (4th South) over Uprr And Future Ipa Line

Carries Sr-77 (4th South) over Uprr And Future Ipa Line, At 1450 W.on 4th So.st..

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure8/9 · Very Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT283 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 8/9Substructure 7/9

283 ft end to end, longest span 146 ft: about 4 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 multi-beam bridge.

Built201016 years old
Length283.5 ft86.4 m
Daily traffic29,985counted 2014
Last inspectedSeptember 2024every 24 months

Location

StateUtah
CountyUtah
LocationAt 1450 W.on 4th So.st.
CarriesSr-77 (4th South)
CrossesUprr And Future Ipa Line
Coordinates40.16145, -111.63836

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignStringer/Multi-beam
Total Length283.5 ft (86.4 m)
Max Span146.0 ft (44.5 m)
Deck Width107.0 ft (32.6 m)
Deck Area2816.6 sq m
Main Spans2
Year Built2010

Traffic

Avg Daily Traffic29,985 (2014)
Truck Traffic25%
Lanes On Bridge4
Lanes Under Bridge4

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number0F 769

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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