US Bridges

SR-39 12th Street over Weber River

Poor

Weber County, Utah · 1 Mile West of I-15 SR126 · Structure no. 0F 238

Built
1970
55 years old
Condition
Poor
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
135 ft
2 main spans
Daily traffic
7,420
2014 count
Owner
State
State Highway Agency

About this bridge

SR-39 12th Street over Weber River is a prestressed concrete stringer/multi-beam or girder carrying SR-39 12th Street over Weber River in Weber County, Utah. It was built in 1970, so it is 55 years old, older than the Utah average of 40.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 7,420 vehicles a day, roughly 31% of them trucks, projected to reach 9,275 by 2034. The structure is 135 ft (41.2 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesSR-39 12th Street
CrossesWeber River
Location1 Mile West of I-15 SR126
RouteState Highway 39
StateUtah
Coordinates41.245, -112.03583
Functional classUrban Other Principal Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, 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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length135 ft (41.2 m)
Longest span58 ft (17.8 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deck99 ft (30.2 m)

Traffic and service

Average daily traffic7,420 (2014)
Projected traffic9,275 by 2034
Trucks31%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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-39 12th Street over Weber River built?

It was built in 1970, making it 55 years old in 2025.

What condition is SR-39 12th Street over Weber River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2023.

How much traffic does SR-39 12th Street over Weber River carry?

About 7,420 vehicles per day (2014 count), of which roughly 31% are trucks.

How long is SR-39 12th Street over Weber River?

The structure is 135 ft (41.2 m) long with a longest span of 58 ft (17.8 m) and a deck 32 ft wide.

Who owns SR-39 12th Street over Weber River?

It is owned by the State Highway Agency.