US Bridges

SR-77 (4th South) over UPRR and Future Ipa Line

Fair

Utah County, Utah · At 1450 W.On 4th So.St. · Structure no. 0F 769

Built
2010
15 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
283 ft
2 main spans
Daily traffic
29,985
2014 count
Owner
State
State Highway Agency

About this bridge

SR-77 (4th South) over UPRR and Future Ipa Line is a prestressed concrete continuous stringer/multi-beam or girder carrying SR-77 (4th South) over UPRR and Future Ipa Line in Utah County, Utah. It was built in 2010, so it is 15 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 29,985 vehicles a day, roughly 25% of them trucks, projected to reach 37,482 by 2034. The structure is 283 ft (86.4 m) long and 107 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesSR-77 (4th South)
CrossesUPRR and Future Ipa Line
LocationAt 1450 W.On 4th So.St.
RouteState Highway 77
CountyUtah County
StateUtah
Coordinates40.16145, -111.63836
Functional classUrban Other Principal Arterial

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.2 US tons
Inventory rating32.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length283 ft (86.4 m)
Longest span146 ft (44.5 m)
Deck width107 ft (32.6 m)
Roadway width78 ft (23.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,985 (2014)
Projected traffic37,482 by 2034
Trucks25%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and railroad
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

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 (4th South) over UPRR and Future Ipa Line built?

It was built in 2010, making it 15 years old in 2025.

What condition is SR-77 (4th South) over UPRR and Future Ipa Line 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 (4th South) over UPRR and Future Ipa Line carry?

About 29,985 vehicles per day (2014 count), of which roughly 25% are trucks.

How long is SR-77 (4th South) over UPRR and Future Ipa Line?

The structure is 283 ft (86.4 m) long with a longest span of 146 ft (44.5 m) and a deck 107 ft wide.

Who owns SR-77 (4th South) over UPRR and Future Ipa Line?

It is owned by the State Highway Agency.