US Bridges

Co. Rd. 20800 No. over Malad River

Fair

Box Elder County, Utah · 2 Miles Nw. of Plymouth · Structure no. 003003V

Built
1980
45 years old
Condition
Fair
inspected November 2023
Type
Culvert
Steel
Length
24 ft
1 main span
Daily traffic
125
2023 count
Owner
County
County Highway Agency

About this bridge

Co. Rd. 20800 No. over Malad River is a steel culvert carrying Co. Rd. 20800 No. over Malad River in Box Elder County, Utah. It was built in 1980, so it is 45 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 125 vehicles a day, roughly 40% of them trucks, projected to reach 150 by 2043. The structure is 24 ft (7.2 m) long. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesCo. Rd. 20800 No.
CrossesMalad River
Location2 Miles Nw. of Plymouth
RouteCounty Highway 1142
CountyBox Elder County
StateUtah
Coordinates41.8861, -112.1885
Functional classRural Minor 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 protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating106.5 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 20
Structure length24 ft (7.2 m)
Longest span24 ft (7.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic125 (2023)
Projected traffic150 by 2043
Trucks40%
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

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 Co. Rd. 20800 No. over Malad River built?

It was built in 1980, making it 45 years old in 2025.

What condition is Co. Rd. 20800 No. over Malad 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 November 2023.

How much traffic does Co. Rd. 20800 No. over Malad River carry?

About 125 vehicles per day (2023 count), of which roughly 40% are trucks.

How long is Co. Rd. 20800 No. over Malad River?

The structure is 24 ft (7.2 m) long with a longest span of 24 ft (7.2 m).

Who owns Co. Rd. 20800 No. over Malad River?

It is owned by the County Highway Agency.