US Bridges

IH 41 over Supple Marsh Creek

Fair

Fond du Lac County, Wisconsin · 0.2 MI North of Sth 23 · Structure no. B20383800000000

Built
1951
74 years old, rebuilt 1952
Condition
Fair
inspected April 2023
Type
Culvert
Concrete
Length
28 ft
3 main spans
Daily traffic
44,700
2023 count
Owner
State
State Highway Agency

About this bridge

IH 41 over Supple Marsh Creek is a concrete culvert carrying IH 41 over Supple Marsh Creek in Fond du Lac County, Wisconsin. It was built in 1951 and reconstructed in 1952, so it is 74 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 44,700 vehicles a day, projected to reach 63,800 by 2042. The structure is 28 ft (8.6 m) long. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesIH 41
CrossesSupple Marsh Creek
Location0.2 MI North of Sth 23
RouteInterstate 41
CountyFond du Lac County
StateWisconsin
Coordinates43.79063, -88.48287
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length28 ft (8.6 m)
Longest span9 ft (2.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic44,700 (2023)
Projected traffic63,800 by 2042
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 IH 41 over Supple Marsh Creek built?

It was built in 1951, making it 74 years old in 2025. It was reconstructed in 1952.

What condition is IH 41 over Supple Marsh 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 April 2023.

How much traffic does IH 41 over Supple Marsh Creek carry?

About 44,700 vehicles per day (2023 count).

How long is IH 41 over Supple Marsh Creek?

The structure is 28 ft (8.6 m) long with a longest span of 9 ft (2.7 m).

Who owns IH 41 over Supple Marsh Creek?

It is owned by the State Highway Agency.