US Bridges

SR-77 over Spanish Fork River

Fair

Utah County, Utah · 4.5 Mi. West of I-15 Int. · Structure no. 0F 527

Built
1985
40 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
94 ft
1 main span
Daily traffic
2,550
2014 count
Owner
State
State Highway Agency

About this bridge

SR-77 over Spanish Fork River is a prestressed concrete stringer/multi-beam or girder carrying SR-77 over Spanish Fork River in Utah County, Utah. It was built in 1985, so it is 40 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 2,550 vehicles a day, roughly 23% of them trucks, projected to reach 3,188 by 2034. The structure is 94 ft (28.8 m) long and 42 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesSR-77
CrossesSpanish Fork River
Location4.5 Mi. West of I-15 Int.
RouteState Highway 77
CountyUtah County
StateUtah
Coordinates40.15034, -111.72616
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.7 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length94 ft (28.8 m)
Longest span91 ft (27.7 m)
Deck width42 ft (12.9 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,550 (2014)
Projected traffic3,188 by 2034
Trucks23%
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

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-77 over Spanish Fork River built?

It was built in 1985, making it 40 years old in 2025.

What condition is SR-77 over Spanish Fork 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 September 2024.

How much traffic does SR-77 over Spanish Fork River carry?

About 2,550 vehicles per day (2014 count), of which roughly 23% are trucks.

How long is SR-77 over Spanish Fork River?

The structure is 94 ft (28.8 m) long with a longest span of 91 ft (27.7 m) and a deck 42 ft wide.

Who owns SR-77 over Spanish Fork River?

It is owned by the State Highway Agency.