US Bridges

SR-30 over Grouse Creek

Fair

Box Elder County, Utah · 6.1 Mi.E. of Nevada Line · Structure no. 0C 459

Built
1963
62 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
106 ft
1 main span
Daily traffic
455
2017 count
Owner
State
State Highway Agency

About this bridge

SR-30 over Grouse Creek is a steel stringer/multi-beam or girder carrying SR-30 over Grouse Creek in Box Elder County, Utah. It was built in 1963, so it is 62 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 455 vehicles a day, roughly 35% of them trucks, projected to reach 546 by 2037. The structure is 106 ft (32.4 m) long and 30 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesSR-30
CrossesGrouse Creek
Location6.1 Mi.E. of Nevada Line
RouteState Highway 30
CountyBox Elder County
StateUtah
Coordinates41.40722, -113.93611
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating19 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length106 ft (32.4 m)
Longest span103 ft (31.3 m)
Deck width30 ft (9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic455 (2017)
Projected traffic546 by 2037
Trucks35%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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-30 over Grouse Creek built?

It was built in 1963, making it 62 years old in 2025.

What condition is SR-30 over Grouse 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 April 2023.

How much traffic does SR-30 over Grouse Creek carry?

About 455 vehicles per day (2017 count), of which roughly 35% are trucks.

How long is SR-30 over Grouse Creek?

The structure is 106 ft (32.4 m) long with a longest span of 103 ft (31.3 m) and a deck 30 ft wide.

Who owns SR-30 over Grouse Creek?

It is owned by the State Highway Agency.