US Bridges

Sth 13 over Chippewa River 33

Poor

Ashland County, Wisconsin · 9.1M N JCT Cth F · Structure no. B02004700000000

Built
1997
28 years old
Condition
Poor
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
100 ft
2 main spans
Daily traffic
1,700
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 13 over Chippewa River 33 is a prestressed concrete continuous stringer/multi-beam or girder carrying Sth 13 over Chippewa River 33 in Ashland County, Wisconsin. It was built in 1997, so it is 28 years old, younger than the Wisconsin average of 40.3 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 1,700 vehicles a day, roughly 11% of them trucks, projected to reach 3,120 by 2043. The structure is 100 ft (30.4 m) long and 46 ft wide. If it were closed, the detour would be 58.4 mi (94 km).

CarriesSth 13
CrossesChippewa River 33
Location9.1M N JCT Cth F
RouteState Highway 13
Coordinates46.12926, -90.56723
Functional classRural Principal Arterial - Other

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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating108 US tons
Inventory rating64.3 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length100 ft (30.4 m)
Longest span48 ft (14.6 m)
Deck width46 ft (14 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,700 (2022)
Projected traffic3,120 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed58.4 mi (94 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$650,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sth 13 over Chippewa River 33 built?

It was built in 1997, making it 28 years old in 2025.

What condition is Sth 13 over Chippewa River 33 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 October 2024.

How much traffic does Sth 13 over Chippewa River 33 carry?

About 1,700 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is Sth 13 over Chippewa River 33?

The structure is 100 ft (30.4 m) long with a longest span of 48 ft (14.6 m) and a deck 46 ft wide.

Who owns Sth 13 over Chippewa River 33?

It is owned by the State Highway Agency.