US Bridges

Wooster Road over Portage River

Fair

Jackson County, Michigan · 4 MI S 3 MI W of Munith · Structure no. 000000000004501

Built
1978
47 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
84 ft
1 main span
Daily traffic
350
1997 count
Owner
County
County Highway Agency

About this bridge

Wooster Road over Portage River is a steel stringer/multi-beam or girder carrying Wooster Road over Portage River in Jackson County, Michigan. It was built in 1978, so it is 47 years old, younger than the Michigan average of 48.3 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 350 vehicles a day, projected to reach 450 by 2017. The structure is 84 ft (25.6 m) long and 38 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesWooster Road
CrossesPortage River
Location4 MI S 3 MI W of Munith
RouteCounty Highway 3865
CountyJackson County
StateMichigan
Coordinates42.33155, -84.30647
Functional classRural Major Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 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
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating109.1 US tons
Inventory rating67.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length84 ft (25.6 m)
Longest span81 ft (24.7 m)
Deck width38 ft (11.6 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (1997)
Projected traffic450 by 2017
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Wooster Road over Portage River built?

It was built in 1978, making it 47 years old in 2025.

What condition is Wooster Road over Portage 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 May 2023.

How much traffic does Wooster Road over Portage River carry?

About 350 vehicles per day (1997 count).

How long is Wooster Road over Portage River?

The structure is 84 ft (25.6 m) long with a longest span of 81 ft (24.7 m) and a deck 38 ft wide.

Who owns Wooster Road over Portage River?

It is owned by the County Highway Agency.