US Bridges

Sth 29 over W Br Suamico River

Fair

Brown County, Wisconsin · 0.4 MI E of CO Line · Structure no. B05025200000000

Built
1988
37 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete
Length
28 ft
2 main spans
Daily traffic
15,900
2021 count
Owner
State
State Highway Agency

About this bridge

Sth 29 over W Br Suamico River is a concrete culvert carrying Sth 29 over W Br Suamico River in Brown County, Wisconsin. It was built in 1988, so it is 37 years old, younger 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 15,900 vehicles a day, roughly 8% of them trucks, projected to reach 34,250 by 2042. The structure is 28 ft (8.4 m) long. If it were closed, the detour would be 2.5 mi (4 km).

CarriesSth 29
CrossesW Br Suamico River
Location0.4 MI E of CO Line
RouteState Highway 29
Coordinates44.59917, -88.2369
Functional classRural Principal Arterial - Other

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 inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 spans2
Design loadHS 20 + Mod
Structure length28 ft (8.4 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,900 (2021)
Projected traffic34,250 by 2042
Trucks8%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Sth 29 over W Br Suamico River built?

It was built in 1988, making it 37 years old in 2025.

What condition is Sth 29 over W Br Suamico River 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 March 2023.

How much traffic does Sth 29 over W Br Suamico River carry?

About 15,900 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is Sth 29 over W Br Suamico River?

The structure is 28 ft (8.4 m) long with a longest span of 11 ft (3.4 m).

Who owns Sth 29 over W Br Suamico River?

It is owned by the State Highway Agency.