Structure 4F 642 · Salt Lake County, UT

I-80 (sr-80) Wbl over Sr-267 400 South St.

Carries I-80 (sr-80) Wbl over Sr-267 400 South St., 700 West 400 South Slc.

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 FT322 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

322 ft end to end, longest span 150 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.

Built200026 years old
Length322.2 ft98.2 m
Daily traffic61,660counted 2014
Last inspectedJuly 2024every 24 months

Location

StateUtah
CountySalt Lake
Location700 West 400 South Slc
CarriesI-80 (sr-80) Wbl
CrossesSr-267 400 South St.
Coordinates40.76008, -111.91361

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignStringer/Multi-beam
Total Length322.2 ft (98.2 m)
Max Span150.3 ft (45.8 m)
Deck Width69.9 ft (21.3 m)
Deck Area2091.7 sq m
Main Spans3
Year Built2000

Traffic

Avg Daily Traffic61,660 (2014)
Truck Traffic15%
Lanes On Bridge4
Lanes Under Bridge8

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number4F 642

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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