US Bridges

Sth 97-ALFRED ST over Black Creek

Fair

Marathon County, Wisconsin · 0.4M N JCT Cth M to W · Structure no. B37054800000000

Built
1932
93 years old, rebuilt 1990
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
161 ft
3 main spans
Daily traffic
2,600
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 97-ALFRED ST over Black Creek is a steel stringer/multi-beam or girder carrying Sth 97-ALFRED ST over Black Creek in Marathon County, Wisconsin. It was built in 1932 and reconstructed in 1990, so it is 93 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 2,600 vehicles a day, roughly 7% of them trucks, projected to reach 3,580 by 2042. The structure is 161 ft (49.2 m) long and 39 ft wide. If it were closed, the detour would be 23 mi (37 km).

Location

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CarriesSth 97-ALFRED ST
CrossesBlack Creek
Location0.4M N JCT Cth M to W
RouteState Highway 97
CountyMarathon County
StateWisconsin
Coordinates45.03584, -90.07343
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.7 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length161 ft (49.2 m)
Longest span53 ft (16.2 m)
Deck width39 ft (11.9 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,600 (2022)
Projected traffic3,580 by 2042
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed23 mi (37 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 97-ALFRED ST over Black Creek built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 1990.

What condition is Sth 97-ALFRED ST over Black 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 October 2023.

How much traffic does Sth 97-ALFRED ST over Black Creek carry?

About 2,600 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Sth 97-ALFRED ST over Black Creek?

The structure is 161 ft (49.2 m) long with a longest span of 53 ft (16.2 m) and a deck 39 ft wide.

Who owns Sth 97-ALFRED ST over Black Creek?

It is owned by the State Highway Agency.