US Bridges

County Road over Cottonwood Creek

Fair

Morgan County, Utah · In Mountain Green · Structure no. 029006C

Built
1930
95 years old, rebuilt 1992
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
52 ft
1 main span
Daily traffic
1,582
2010 count
Owner
County
County Highway Agency

About this bridge

County Road over Cottonwood Creek is a steel stringer/multi-beam or girder carrying County Road over Cottonwood Creek in Morgan County, Utah. It was built in 1930 and reconstructed in 1992, so it is 95 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 5 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 1,582 vehicles a day, roughly 10% of them trucks, projected to reach 1,923 by 2030. The structure is 52 ft (15.8 m) long and 32 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesCounty Road
CrossesCottonwood Creek
LocationIn Mountain Green
RouteCounty Highway 1978
CountyMorgan County
StateUtah
Coordinates41.14057, -111.78666
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length52 ft (15.8 m)
Longest span48 ft (14.6 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,582 (2010)
Projected traffic1,923 by 2030
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was County Road over Cottonwood Creek built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1992.

What condition is County Road over 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 May 2024.

How much traffic does County Road over Cottonwood Creek carry?

About 1,582 vehicles per day (2010 count), of which roughly 10% are trucks.

How long is County Road over Cottonwood Creek?

The structure is 52 ft (15.8 m) long with a longest span of 48 ft (14.6 m) and a deck 32 ft wide.

Who owns County Road over Cottonwood Creek?

It is owned by the County Highway Agency.