US Bridges

SR-257 over Sevier River

Fair

Millard County, Utah · In Town of Deseret · Structure no. 0F 521

Built
1985
40 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
120 ft
1 main span
Daily traffic
1,704
2017 count
Owner
State
State Highway Agency

About this bridge

SR-257 over Sevier River is a prestressed concrete stringer/multi-beam or girder carrying SR-257 over Sevier River in Millard County, Utah. It was built in 1985, so it is 40 years old, younger 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 1,704 vehicles a day, roughly 49% of them trucks, projected to reach 2,045 by 2037. The structure is 120 ft (36.7 m) long and 51 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesSR-257
CrossesSevier River
LocationIn Town of Deseret
RouteState Highway 257
CountyMillard County
StateUtah
Coordinates39.2878, -112.6527
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88.2 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length120 ft (36.7 m)
Longest span118 ft (36 m)
Deck width51 ft (15.6 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,704 (2017)
Projected traffic2,045 by 2037
Trucks49%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

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 SR-257 over Sevier River built?

It was built in 1985, making it 40 years old in 2025.

What condition is SR-257 over Sevier 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 2023.

How much traffic does SR-257 over Sevier River carry?

About 1,704 vehicles per day (2017 count), of which roughly 49% are trucks.

How long is SR-257 over Sevier River?

The structure is 120 ft (36.7 m) long with a longest span of 118 ft (36 m) and a deck 51 ft wide.

Who owns SR-257 over Sevier River?

It is owned by the State Highway Agency.