US Bridges

SR-121 over Ashley Upper Canal

Good

Uintah County, Utah · West Side of Maeser · Structure no. 0E1842

Built
1971
54 years old
Condition
Good
inspected July 2023
Type
Culvert
Concrete
Length
23 ft
1 main span
Daily traffic
2,194
2022 count
Owner
State
State Highway Agency

About this bridge

SR-121 over Ashley Upper Canal is a concrete culvert carrying SR-121 over Ashley Upper Canal in Uintah County, Utah. It was built in 1971, so it is 54 years old, older than the Utah average of 40.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,194 vehicles a day, roughly 34% of them trucks, projected to reach 2,633 by 2042. The structure is 23 ft (6.9 m) long and 44 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesSR-121
CrossesAshley Upper Canal
LocationWest Side of Maeser
RouteState Highway 121
CountyUintah County
StateUtah
Coordinates40.46274, -109.59685
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.7 US tons
Inventory rating27.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20 + Mod
Structure length23 ft (6.9 m)
Longest span20 ft (6.2 m)
Deck width44 ft (13.4 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,194 (2022)
Projected traffic2,633 by 2042
Trucks34%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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-121 over Ashley Upper Canal built?

It was built in 1971, making it 54 years old in 2025.

What condition is SR-121 over Ashley Upper Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does SR-121 over Ashley Upper Canal carry?

About 2,194 vehicles per day (2022 count), of which roughly 34% are trucks.

How long is SR-121 over Ashley Upper Canal?

The structure is 23 ft (6.9 m) long with a longest span of 20 ft (6.2 m) and a deck 44 ft wide.

Who owns SR-121 over Ashley Upper Canal?

It is owned by the State Highway Agency.