Structure D 480 · Salt Lake County, UT

Sr-68 Redwood Road over Surplus Canal

Carries Sr-68 Redwood Road over Surplus Canal, 1300 So. Redwood Road-s.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT114 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 7/9Substructure 5/9 · sets the rating

114 ft end to end, longest span 38 ft. Lengths and the car 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.

Built1936rebuilt 1959
Length113.8 ft34.7 m
Daily traffic27,600counted 2014
Last inspectedDecember 2022every 24 months

Location

StateUtah
CountySalt Lake
Location1300 So. Redwood Road-s
CarriesSr-68 Redwood Road
CrossesSurplus Canal
Coordinates40.74001, -111.93888

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length113.8 ft (34.7 m)
Max Span38.1 ft (11.6 m)
Deck Width91.9 ft (28 m)
Deck Area971.6 sq m
Main Spans3
Year Built1936 (reconstructed 1959)

Traffic

Avg Daily Traffic27,600 (2014)
Truck Traffic28%
Lanes On Bridge5

Inspection & Ownership

Last InspectionDecember 2022
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical4 — Foundations need monitoring
Structure Number0D 480

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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