US Bridges

Sth 310 Madison over W Twin River

Fair

Manitowoc County, Wisconsin · 4.6M E JCT Cth B · Structure no. B36017600000000

Built
2008
17 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete Continuous
Length
312 ft
6 main spans
Daily traffic
8,800
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Sth 310 Madison over W Twin River is a concrete continuous slab carrying Sth 310 Madison over W Twin River in Manitowoc County, Wisconsin. It was built in 2008, so it is 17 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 5 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 8,800 vehicles a day, projected to reach 10,560 by 2043. The structure is 312 ft (95.2 m) long and 56 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSth 310 Madison
CrossesW Twin River
Location4.6M E JCT Cth B
RouteState Highway 310
CountyManitowoc County
StateWisconsin
Coordinates44.14685, -87.57302
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating77.4 US tons
Inventory rating46.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 25 or greater
Structure length312 ft (95.2 m)
Longest span61 ft (18.7 m)
Deck width56 ft (17.1 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,800 (2021)
Projected traffic10,560 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 310 Madison over W Twin River built?

It was built in 2008, making it 17 years old in 2025.

What condition is Sth 310 Madison over W Twin 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 September 2024.

How much traffic does Sth 310 Madison over W Twin River carry?

About 8,800 vehicles per day (2021 count).

How long is Sth 310 Madison over W Twin River?

The structure is 312 ft (95.2 m) long with a longest span of 61 ft (18.7 m) and a deck 56 ft wide.

Who owns Sth 310 Madison over W Twin River?

It is owned by the City or Municipal Highway Agency.