US Bridges

County Road over Santa Clara River

Fair

Washington County, Utah · 9.7 Miles W.Of St. George · Structure no. 053031C

Built
1931
94 years old, rebuilt 1991
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
188 ft
3 main spans
Daily traffic
6,533
2010 count
Owner
County
County Highway Agency

About this bridge

County Road over Santa Clara River is a steel continuous stringer/multi-beam or girder carrying County Road over Santa Clara River in Washington County, Utah. It was built in 1931 and reconstructed in 1991, so it is 94 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 6,533 vehicles a day, roughly 5% of them trucks, projected to reach 7,938 by 2030. The structure is 188 ft (57.2 m) long and 33 ft wide. If it were closed, the detour would be 49.7 mi (80 km).

Location

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CarriesCounty Road
CrossesSanta Clara River
Location9.7 Miles W.Of St. George
RouteCounty Highway 3184
CountyWashington County
StateUtah
Coordinates37.18167, -113.74139
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating35.7 US tons
Inventory rating25 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length188 ft (57.2 m)
Longest span80 ft (24.4 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,533 (2010)
Projected traffic7,938 by 2030
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed49.7 mi (80 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was County Road over Santa Clara River built?

It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1991.

What condition is County Road over Santa Clara River 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 February 2024.

How much traffic does County Road over Santa Clara River carry?

About 6,533 vehicles per day (2010 count), of which roughly 5% are trucks.

How long is County Road over Santa Clara River?

The structure is 188 ft (57.2 m) long with a longest span of 80 ft (24.4 m) and a deck 33 ft wide.

Who owns County Road over Santa Clara River?

It is owned by the County Highway Agency.