Structure 3F 812 · Utah County, UT

I-15SB (sr-15) over 100 E. In American Fork

Carries I-15SB (sr-15) over 100 E. In American Fork, SE Part Of American Fork.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT125 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

125 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.

Built201115 years old
Length125.0 ft38.1 m
Daily traffic209,636counted 2023
Last inspectedFebruary 2023every 24 months

Location

StateUtah
CountyUtah
LocationSE Part Of American Fork
CarriesI-15SB (sr-15)
Crosses100 E. In American Fork
Coordinates40.36681, -111.79550

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length125.0 ft (38.1 m)
Max Span119.8 ft (36.5 m)
Deck Width100.7 ft (30.7 m)
Deck Area1169.7 sq m
Main Spans1
Year Built2011

Traffic

Avg Daily Traffic209,636 (2023)
Truck Traffic18%
Lanes On Bridge6
Lanes Under Bridge2

Inspection & Ownership

Last InspectionFebruary 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number3F 812

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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