US Bridges

Seven Mile Road over Pinconning River

Fair

Bay County, Michigan · 1000 Ft N of Neuman RD · Structure no. 000000000000704

Built
1992
33 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete
Length
24 ft
1 main span
Daily traffic
1,778
2000 count
Owner
County
County Highway Agency

About this bridge

Seven Mile Road over Pinconning River is a concrete culvert carrying Seven Mile Road over Pinconning River in Bay County, Michigan. It was built in 1992, so it is 33 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 1,778 vehicles a day, roughly 7% of them trucks, projected to reach 2,844 by 2020. The structure is 24 ft (7.4 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSeven Mile Road
CrossesPinconning River
Location1000 Ft N of Neuman RD
RouteCounty Highway 929
CountyBay County
StateMichigan
Coordinates43.84419, -84.02615
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.1 US tons
Inventory rating35.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length24 ft (7.4 m)
Longest span22 ft (6.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,778 (2000)
Projected traffic2,844 by 2020
Trucks7%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Seven Mile Road over Pinconning River built?

It was built in 1992, making it 33 years old in 2025.

What condition is Seven Mile Road over Pinconning 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 April 2024.

How much traffic does Seven Mile Road over Pinconning River carry?

About 1,778 vehicles per day (2000 count), of which roughly 7% are trucks.

How long is Seven Mile Road over Pinconning River?

The structure is 24 ft (7.4 m) long with a longest span of 22 ft (6.7 m).

Who owns Seven Mile Road over Pinconning River?

It is owned by the County Highway Agency.