US Bridges

4780 SO.ST.FA#2144 over Big Cottonwood Creek

FairPosted for load

Salt Lake County, Utah · 1400 E. 4780 S. Sl.Co. · Structure no. 035135E

Built
1973
52 years old
Condition
Fair
inspected December 2023
Type
Culvert
Concrete Continuous
Length
30 ft
2 main spans
Daily traffic
16,215
2013 count
Owner
County
County Highway Agency

About this bridge

4780 SO.ST.FA#2144 over Big Cottonwood Creek is a concrete continuous culvert carrying 4780 SO.ST.FA#2144 over Big Cottonwood Creek in Salt Lake County, Utah. It was built in 1973, so it is 52 years old, older than the Utah average of 40.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 16,215 vehicles a day, roughly 5% of them trucks, projected to reach 20,270 by 2033. The structure is 30 ft (9.1 m) long and 80 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries4780 SO.ST.FA#2144
CrossesBig Cottonwood Creek
Location1400 E. 4780 S. Sl.Co.
RouteCounty Highway 2144
CountySalt Lake County
StateUtah
Coordinates40.6666, -111.85135
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating14.3 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length30 ft (9.1 m)
Longest span12 ft (3.8 m)
Deck width80 ft (24.4 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,215 (2013)
Projected traffic20,270 by 2033
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 4780 SO.ST.FA#2144 over Big Cottonwood Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is 4780 SO.ST.FA#2144 over Big Cottonwood Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in December 2023.

How much traffic does 4780 SO.ST.FA#2144 over Big Cottonwood Creek carry?

About 16,215 vehicles per day (2013 count), of which roughly 5% are trucks.

How long is 4780 SO.ST.FA#2144 over Big Cottonwood Creek?

The structure is 30 ft (9.1 m) long with a longest span of 12 ft (3.8 m) and a deck 80 ft wide.

Who owns 4780 SO.ST.FA#2144 over Big Cottonwood Creek?

It is owned by the County Highway Agency.