US Bridges

US-89 (SR-89) over Big Cottonwood Creek

Fair

Salt Lake County, Utah · 4200 So. State ST Murray · Structure no. 0D 811

Built
1957
68 years old, rebuilt 1974
Condition
Fair
inspected October 2022
Type
Frame
Concrete
Length
25 ft
1 main span
Daily traffic
32,926
2021 count
Owner
State
State Highway Agency

About this bridge

US-89 (SR-89) over Big Cottonwood Creek is a concrete frame carrying US-89 (SR-89) over Big Cottonwood Creek in Salt Lake County, Utah. It was built in 1957 and reconstructed in 1974, so it is 68 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.

It carries about 32,926 vehicles a day, roughly 10% of them trucks, projected to reach 39,511 by 2041. The structure is 25 ft (7.6 m) long and 135 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesUS-89 (SR-89)
CrossesBig Cottonwood Creek
Location4200 So. State ST Murray
RouteU.S. Route 89
CountySalt Lake County
StateUtah
Coordinates40.67954, -111.88826
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.5 US tons
Inventory rating52.1 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length25 ft (7.6 m)
Longest span23 ft (7 m)
Deck width135 ft (41 m)
Roadway width88 ft (26.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32,926 (2021)
Projected traffic39,511 by 2041
Trucks10%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US-89 (SR-89) over Big Cottonwood Creek built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1974.

What condition is US-89 (SR-89) 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 October 2022.

How much traffic does US-89 (SR-89) over Big Cottonwood Creek carry?

About 32,926 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is US-89 (SR-89) over Big Cottonwood Creek?

The structure is 25 ft (7.6 m) long with a longest span of 23 ft (7 m) and a deck 135 ft wide.

Who owns US-89 (SR-89) over Big Cottonwood Creek?

It is owned by the State Highway Agency.