Structure 35135E · Salt Lake County, UT

4780 So.st.fa#2144 over Big Cottonwood Creek

Carries 4780 So.st.fa#2144 over Big Cottonwood Creek, 1400 E. 4780 S. Sl.co..

Overall conditionFair

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

How ratings work
Culvertsets the rating6/9 · Satisfactory
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT30 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 6/9

A culvert 30 ft across with 2 openings. 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, so those are drawn as typical for a culvert.

Built197353 years old
Length29.9 ft9.1 m
Daily traffic16,215counted 2013
Last inspectedDecember 2023every 24 months

Location

StateUtah
CountySalt Lake
Location1400 E. 4780 S. Sl.co.
Carries4780 So.st.fa#2144
CrossesBig Cottonwood Creek
Coordinates40.66660, -111.85135

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length29.9 ft (9.1 m)
Max Span12.5 ft (3.8 m)
Deck Width80.1 ft (24.4 m)
Deck Area222.0 sq m
Main Spans2
Year Built1973

Traffic

Avg Daily Traffic16,215 (2013)
Truck Traffic5%
Lanes On Bridge4

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number035135E

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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