US Bridges

SR-79 31st Street over Weber River

Fair

Weber County, Utah · Adj. To. 31st St. Intchg. · Structure no. 0F 742

Built
2008
17 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
136 ft
1 main span
Daily traffic
26,601
2021 count
Owner
State
State Highway Agency

About this bridge

SR-79 31st Street over Weber River is a prestressed concrete stringer/multi-beam or girder carrying SR-79 31st Street over Weber River in Weber County, Utah. It was built in 2008, so it is 17 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 26,601 vehicles a day, roughly 25% of them trucks, projected to reach 31,921 by 2041. The structure is 136 ft (41.5 m) long and 135 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSR-79 31st Street
CrossesWeber River
LocationAdj. To. 31st St. Intchg.
RouteState Highway 79
CountyWeber County
StateUtah
Coordinates41.20587, -111.99136
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.4 US tons
Inventory rating55.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length136 ft (41.5 m)
Longest span133 ft (40.5 m)
Deck width135 ft (41.1 m)
Roadway width132 ft (40.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,601 (2021)
Projected traffic31,921 by 2041
Trucks25%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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-79 31st Street over Weber River built?

It was built in 2008, making it 17 years old in 2025.

What condition is SR-79 31st Street over Weber 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 August 2023.

How much traffic does SR-79 31st Street over Weber River carry?

About 26,601 vehicles per day (2021 count), of which roughly 25% are trucks.

How long is SR-79 31st Street over Weber River?

The structure is 136 ft (41.5 m) long with a longest span of 133 ft (40.5 m) and a deck 135 ft wide.

Who owns SR-79 31st Street over Weber River?

It is owned by the State Highway Agency.