US Bridges

Eight Mile Road over Kawkawlin River

PoorPosted for load

Bay County, Michigan · 0.5 MI S of Wheeler RD · Structure no. 000000000000746

Built
1934
91 years old
Condition
Poor
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
1 main span
Daily traffic
380
2000 count
Owner
County
County Highway Agency

About this bridge

Eight Mile Road over Kawkawlin River is a steel stringer/multi-beam or girder carrying Eight Mile Road over Kawkawlin River in Bay County, Michigan. It was built in 1934, so it is 91 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 380 vehicles a day, roughly 10% of them trucks, projected to reach 456 by 2020. The structure is 40 ft (12.2 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesEight Mile Road
CrossesKawkawlin River
Location0.5 MI S of Wheeler RD
RouteCounty Highway 0
Coordinates43.63189, -84.0491
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

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.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27.4 US tons
Inventory rating16.4 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length40 ft (12.2 m)
Longest span38 ft (11.5 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic380 (2000)
Projected traffic456 by 2020
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$420,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Eight Mile Road over Kawkawlin River built?

It was built in 1934, making it 91 years old in 2025.

What condition is Eight Mile Road over Kawkawlin River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.

How much traffic does Eight Mile Road over Kawkawlin River carry?

About 380 vehicles per day (2000 count), of which roughly 10% are trucks.

How long is Eight Mile Road over Kawkawlin River?

The structure is 40 ft (12.2 m) long with a longest span of 38 ft (11.5 m) and a deck 31 ft wide.

Who owns Eight Mile Road over Kawkawlin River?

It is owned by the County Highway Agency.