Structure 1F 647N · Salt Lake County, UT

I-15 (sr-15) Nbl over 8000 South St. Wasatch

Carries I-15 (sr-15) Nbl over 8000 South St. Wasatch, Wasatch Street 400 West.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT126 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 7/9 · sets the rating

126 ft end to end, longest span 70 ft. 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.

Built199927 years old
Length126.3 ft38.5 m
Daily traffic230,000counted 2014
Last inspectedOctober 2024every 24 months

Location

StateUtah
CountySalt Lake
LocationWasatch Street 400 West
CarriesI-15 (sr-15) Nbl
Crosses8000 South St. Wasatch
Coordinates40.60569, -111.90461

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length126.3 ft (38.5 m)
Max Span69.9 ft (21.3 m)
Deck Width96.8 ft (29.5 m)
Deck Area1135.8 sq m
Main Spans3
Year Built1999

Traffic

Avg Daily Traffic230,000 (2014)
Truck Traffic25%
Lanes On Bridge6
Lanes Under Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number1F 647N

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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