US Bridges

Koss Road (S-4) over Menominee River

Good

Menominee County, Michigan · 0.5 Mi. SE of Koss · Structure no. 000000000012597

Built
1991
34 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
348 ft
3 main spans
Daily traffic
463
1998 count
Owner
County
County Highway Agency

About this bridge

Koss Road (S-4) over Menominee River is a prestressed concrete stringer/multi-beam or girder carrying Koss Road (S-4) over Menominee River in Menominee County, Michigan. It was built in 1991, so it is 34 years old, younger than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 463 vehicles a day, projected to reach 65 by 2019. The structure is 348 ft (106 m) long and 26 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesKoss Road (S-4)
CrossesMenominee River
Location0.5 Mi. SE of Koss
RouteCounty Highway 0
CountyMenominee County
StateMichigan
Coordinates45.38727, -87.70208
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating97.9 US tons
Inventory rating50.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length348 ft (106 m)
Longest span115 ft (35.1 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic463 (1998)
Projected traffic65 by 2019
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 Koss Road (S-4) over Menominee River built?

It was built in 1991, making it 34 years old in 2025.

What condition is Koss Road (S-4) over Menominee River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.

How much traffic does Koss Road (S-4) over Menominee River carry?

About 463 vehicles per day (1998 count).

How long is Koss Road (S-4) over Menominee River?

The structure is 348 ft (106 m) long with a longest span of 115 ft (35.1 m) and a deck 26 ft wide.

Who owns Koss Road (S-4) over Menominee River?

It is owned by the County Highway Agency.