US Bridges

SR-21 over Frisco Wash

Fair

Beaver County, Utah · 16.1 Mi.West of Milford · Structure no. 0E 957

Built
1953
72 years old
Condition
Fair
inspected February 2023
Type
Culvert
Concrete Continuous
Length
42 ft
2 main spans
Daily traffic
329
2022 count
Owner
State
State Highway Agency

About this bridge

SR-21 over Frisco Wash is a concrete continuous culvert carrying SR-21 over Frisco Wash in Beaver County, Utah. It was built in 1953, so it is 72 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 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 329 vehicles a day, roughly 41% of them trucks, projected to reach 395 by 2042. The structure is 42 ft (12.9 m) long. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesSR-21
CrossesFrisco Wash
Location16.1 Mi.West of Milford
RouteState Highway 21
CountyBeaver County
StateUtah
Coordinates38.43786, -113.27226
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
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
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.5 US tons
Inventory rating40.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length42 ft (12.9 m)
Longest span20 ft (6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic329 (2022)
Projected traffic395 by 2042
Trucks41%
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-21 over Frisco Wash built?

It was built in 1953, making it 72 years old in 2025.

What condition is SR-21 over Frisco Wash 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-21 over Frisco Wash carry?

About 329 vehicles per day (2022 count), of which roughly 41% are trucks.

How long is SR-21 over Frisco Wash?

The structure is 42 ft (12.9 m) long with a longest span of 20 ft (6 m).

Who owns SR-21 over Frisco Wash?

It is owned by the State Highway Agency.