US Bridges

Wilder RD over M-13/I-75 Conn

Good

Bay County, Michigan · 1.9 MI S of Kawkawlin · Structure no. 000000000000670

Built
1961
64 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
212 ft
4 main spans
Daily traffic
6,349
2014 count
Owner
State
State Highway Agency

About this bridge

Wilder RD over M-13/I-75 Conn is a steel stringer/multi-beam or girder carrying Wilder RD over M-13/I-75 Conn in Bay County, Michigan. It was built in 1961, so it is 64 years old, older 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 6,349 vehicles a day, roughly 5% of them trucks, projected to reach 7,301 by 2034. The structure is 212 ft (64.7 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesWilder RD
CrossesM-13/I-75 Conn
Location1.9 MI S of Kawkawlin
RouteCounty Highway 2008
CountyBay County
StateMichigan
Coordinates43.62404, -83.94406
Functional classUrban Other Principal Arterial

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.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating75.7 US tons
Inventory rating45.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length212 ft (64.7 m)
Longest span69 ft (20.9 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,349 (2014)
Projected traffic7,301 by 2034
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Wilder RD over M-13/I-75 Conn built?

It was built in 1961, making it 64 years old in 2025.

What condition is Wilder RD over M-13/I-75 Conn 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 September 2023.

How much traffic does Wilder RD over M-13/I-75 Conn carry?

About 6,349 vehicles per day (2014 count), of which roughly 5% are trucks.

How long is Wilder RD over M-13/I-75 Conn?

The structure is 212 ft (64.7 m) long with a longest span of 69 ft (20.9 m) and a deck 33 ft wide.

Who owns Wilder RD over M-13/I-75 Conn?

It is owned by the State Highway Agency.