US Bridges

M-13 over Kawkawlin River

Fair

Bay County, Michigan · In Kawkawlin · Structure no. 000000000000588

Built
1931
94 years old, rebuilt 2009
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
112 ft
2 main spans
Daily traffic
17,442
2007 count
Owner
State
State Highway Agency

About this bridge

M-13 over Kawkawlin River is a steel stringer/multi-beam or girder carrying M-13 over Kawkawlin River in Bay County, Michigan. It was built in 1931 and reconstructed in 2009, so it is 94 years old, older 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 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 17,442 vehicles a day, roughly 3% of them trucks, projected to reach 18,101 by 2018. The structure is 112 ft (34 m) long and 61 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesM-13
CrossesKawkawlin River
LocationIn Kawkawlin
RouteState Highway 13
CountyBay County
StateMichigan
Coordinates43.65373, -83.94449
Functional classRural 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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to 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 rating93.6 US tons
Inventory rating56.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length112 ft (34 m)
Longest span55 ft (16.7 m)
Deck width61 ft (18.5 m)
Roadway width53 ft (16.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,442 (2007)
Projected traffic18,101 by 2018
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 M-13 over Kawkawlin River built?

It was built in 1931, making it 94 years old in 2025. It was reconstructed in 2009.

What condition is M-13 over Kawkawlin 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 November 2024.

How much traffic does M-13 over Kawkawlin River carry?

About 17,442 vehicles per day (2007 count), of which roughly 3% are trucks.

How long is M-13 over Kawkawlin River?

The structure is 112 ft (34 m) long with a longest span of 55 ft (16.7 m) and a deck 61 ft wide.

Who owns M-13 over Kawkawlin River?

It is owned by the State Highway Agency.