US Bridges

Sth 64-BRIDGE ST over Chippewa River 18

Fair

Chippewa County, Wisconsin · 0.8M E JCT Sth 178 · Structure no. B09008700000000

Built
1971
54 years old
Condition
Fair
inspected May 2023
Type
Arch - Thru
Steel
Length
490 ft
1 main span
Daily traffic
3,500
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 64-BRIDGE ST over Chippewa River 18 is a steel arch - thru carrying Sth 64-BRIDGE ST over Chippewa River 18 in Chippewa County, Wisconsin. It was built in 1971, so it is 54 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 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 3,500 vehicles a day, roughly 5% of them trucks, projected to reach 4,200 by 2042. The structure is 490 ft (149.4 m) long and 51 ft wide. If it were closed, the detour would be 51.6 mi (83 km).

Location

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CarriesSth 64-BRIDGE ST
CrossesChippewa River 18
Location0.8M E JCT Sth 178
RouteState Highway 64
CountyChippewa County
StateWisconsin
Coordinates45.16532, -91.15885
Functional classRural Minor 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.8 US tons
Inventory rating39.2 US tons

Structure

Structure typeArch - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length490 ft (149.4 m)
Longest span485 ft (147.8 m)
Deck width51 ft (15.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deck33 ft (9.9 m)

Traffic and service

Average daily traffic3,500 (2022)
Projected traffic4,200 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed51.6 mi (83 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Sth 64-BRIDGE ST over Chippewa River 18 built?

It was built in 1971, making it 54 years old in 2025.

What condition is Sth 64-BRIDGE ST over Chippewa River 18 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 64-BRIDGE ST over Chippewa River 18 carry?

About 3,500 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Sth 64-BRIDGE ST over Chippewa River 18?

The structure is 490 ft (149.4 m) long with a longest span of 485 ft (147.8 m) and a deck 51 ft wide.

Who owns Sth 64-BRIDGE ST over Chippewa River 18?

It is owned by the State Highway Agency.