US Bridges

SR-66 over East Canyon Creek

FairPosted for load

Morgan County, Utah · 2.5 Mi.East Portersville · Structure no. 0F 424

Built
1930
95 years old, rebuilt 1978
Condition
Fair
inspected July 2023
Type
Tee Beam
Prestressed Concrete
Length
25 ft
1 main span
Daily traffic
415
2014 count
Owner
State
State Highway Agency

About this bridge

SR-66 over East Canyon Creek is a prestressed concrete tee beam carrying SR-66 over East Canyon Creek in Morgan County, Utah. It was built in 1930 and reconstructed in 1978, so it is 95 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. Its operating status is: posted for load restriction.

It carries about 415 vehicles a day, roughly 34% of them trucks, projected to reach 519 by 2034. The structure is 25 ft (7.6 m) long and 29 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

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CarriesSR-66
CrossesEast Canyon Creek
Location2.5 Mi.East Portersville
RouteState Highway 66
CountyMorgan County
StateUtah
Coordinates40.94975, -111.65712
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.2 US tons
Inventory rating17.9 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20 + Mod
Structure length25 ft (7.6 m)
Longest span25 ft (7.5 m)
Deck width29 ft (8.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic415 (2014)
Projected traffic519 by 2034
Trucks34%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR-66 over East Canyon Creek built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1978.

What condition is SR-66 over East Canyon 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 July 2023.

How much traffic does SR-66 over East Canyon Creek carry?

About 415 vehicles per day (2014 count), of which roughly 34% are trucks.

How long is SR-66 over East Canyon Creek?

The structure is 25 ft (7.6 m) long with a longest span of 25 ft (7.5 m) and a deck 29 ft wide.

Who owns SR-66 over East Canyon Creek?

It is owned by the State Highway Agency.