US Bridges

Sth 312 over IH 94

Fair

Eau Claire County, Wisconsin · 0.2M W JCT Ush 12 · Structure no. B18001500000000

Built
1967
58 years old, rebuilt 1988
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
304 ft
4 main spans
Daily traffic
13,300
2021 count
Owner
State
State Highway Agency

About this bridge

Sth 312 over IH 94 is a steel continuous stringer/multi-beam or girder carrying Sth 312 over IH 94 in Eau Claire County, Wisconsin. It was built in 1967 and reconstructed in 1988, so it is 58 years old, older than the Wisconsin average of 40.3 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.

It carries about 13,300 vehicles a day, roughly 3% of them trucks, projected to reach 15,960 by 2041. The structure is 304 ft (92.8 m) long and 55 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesSth 312
CrossesIH 94
Location0.2M W JCT Ush 12
RouteState Highway 312
CountyEau Claire County
StateWisconsin
Coordinates44.84277, -91.6044
Functional classRural Minor 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length304 ft (92.8 m)
Longest span103 ft (31.4 m)
Deck width55 ft (16.9 m)
Roadway width48 ft (14.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,300 (2021)
Projected traffic15,960 by 2041
Trucks3%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 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 Sth 312 over IH 94 built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 1988.

What condition is Sth 312 over IH 94 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 Sth 312 over IH 94 carry?

About 13,300 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Sth 312 over IH 94?

The structure is 304 ft (92.8 m) long with a longest span of 103 ft (31.4 m) and a deck 55 ft wide.

Who owns Sth 312 over IH 94?

It is owned by the State Highway Agency.