US Bridges

Seven Mile Road over N Br of Kawkawlin River

Fair

Bay County, Michigan · 1000 Ft N of River RD · Structure no. 000000000000702

Built
1995
30 years old
Condition
Fair
inspected May 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
85 ft
1 main span
Daily traffic
1,436
2000 count
Owner
County
County Highway Agency

About this bridge

Seven Mile Road over N Br of Kawkawlin River is a prestressed concrete box beam or girders - multiple carrying Seven Mile Road over N Br of Kawkawlin River in Bay County, Michigan. It was built in 1995, so it is 30 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 1,436 vehicles a day, roughly 7% of them trucks, projected to reach 2,297 by 2020. The structure is 85 ft (25.9 m) long and 42 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesSeven Mile Road
CrossesN Br of Kawkawlin River
Location1000 Ft N of River RD
RouteCounty Highway 929
CountyBay County
StateMichigan
Coordinates43.70133, -84.02797
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.7 US tons
Inventory rating62.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length85 ft (25.9 m)
Longest span81 ft (24.7 m)
Deck width42 ft (12.7 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,436 (2000)
Projected traffic2,297 by 2020
Trucks7%
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 Seven Mile Road over N Br of Kawkawlin River built?

It was built in 1995, making it 30 years old in 2025.

What condition is Seven Mile Road over N Br of 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 May 2024.

How much traffic does Seven Mile Road over N Br of Kawkawlin River carry?

About 1,436 vehicles per day (2000 count), of which roughly 7% are trucks.

How long is Seven Mile Road over N Br of Kawkawlin River?

The structure is 85 ft (25.9 m) long with a longest span of 81 ft (24.7 m) and a deck 42 ft wide.

Who owns Seven Mile Road over N Br of Kawkawlin River?

It is owned by the County Highway Agency.