US Bridges

County RD FA#5230 over Black Slough

Fair

Box Elder County, Utah · 2.7 Mi.Nw of Brigham City · Structure no. 003078E

Built
2011
14 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete
Length
25 ft
2 main spans
Daily traffic
517
2010 count
Owner
County
County Highway Agency

About this bridge

County RD FA#5230 over Black Slough is a concrete culvert carrying County RD FA#5230 over Black Slough in Box Elder County, Utah. It was built in 2011, so it is 14 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 517 vehicles a day, roughly 5% of them trucks, projected to reach 628 by 2030. The structure is 25 ft (7.6 m) long and 62 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesCounty RD FA#5230
CrossesBlack Slough
Location2.7 Mi.Nw of Brigham City
RouteCounty Highway 1082
CountyBox Elder County
StateUtah
Coordinates41.5098, -112.07694
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating35.7 US tons
Inventory rating21.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length25 ft (7.6 m)
Longest span10 ft (3 m)
Deck width62 ft (19 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic517 (2010)
Projected traffic628 by 2030
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 County RD FA#5230 over Black Slough built?

It was built in 2011, making it 14 years old in 2025.

What condition is County RD FA#5230 over Black Slough 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 November 2023.

How much traffic does County RD FA#5230 over Black Slough carry?

About 517 vehicles per day (2010 count), of which roughly 5% are trucks.

How long is County RD FA#5230 over Black Slough?

The structure is 25 ft (7.6 m) long with a longest span of 10 ft (3 m) and a deck 62 ft wide.

Who owns County RD FA#5230 over Black Slough?

It is owned by the County Highway Agency.