US Bridges

Sth 178 over Oneil Creek

Fair

Chippewa County, Wisconsin · 2.8M N JCT Cth S · Structure no. B09001000000000

Built
1956
69 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
130 ft
2 main spans
Daily traffic
4,400
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 178 over Oneil Creek is a steel stringer/multi-beam or girder carrying Sth 178 over Oneil Creek in Chippewa County, Wisconsin. It was built in 1956, so it is 69 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 4,400 vehicles a day, roughly 4% of them trucks, projected to reach 5,280 by 2042. The structure is 130 ft (39.7 m) long and 29 ft wide. If it were closed, the detour would be 49.7 mi (80 km).

Location

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CarriesSth 178
CrossesOneil Creek
Location2.8M N JCT Cth S
RouteState Highway 178
CountyChippewa County
StateWisconsin
Coordinates45.00065, -91.35292
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.2 US tons
Inventory rating25 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length130 ft (39.7 m)
Longest span63 ft (19.2 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,400 (2022)
Projected traffic5,280 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed49.7 mi (80 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$823,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sth 178 over Oneil Creek built?

It was built in 1956, making it 69 years old in 2025.

What condition is Sth 178 over Oneil Creek 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 May 2023.

How much traffic does Sth 178 over Oneil Creek carry?

About 4,400 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Sth 178 over Oneil Creek?

The structure is 130 ft (39.7 m) long with a longest span of 63 ft (19.2 m) and a deck 29 ft wide.

Who owns Sth 178 over Oneil Creek?

It is owned by the State Highway Agency.