US Bridges

M-69 over N Br Sturgeon River

Fair

Dickinson County, Michigan · 1.5 MI East of M-95 · Structure no. 000000000002188

Built
1956
69 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
1,500
2014 count
Owner
State
State Highway Agency

About this bridge

M-69 over N Br Sturgeon River is a concrete culvert carrying M-69 over N Br Sturgeon River in Dickinson County, Michigan. It was built in 1956, so it is 69 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 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 1,500 vehicles a day, roughly 8% of them trucks, projected to reach 1,725 by 2034. The structure is 21 ft (6.3 m) long. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesM-69
CrossesN Br Sturgeon River
Location1.5 MI East of M-95
RouteState Highway 69
CountyDickinson County
StateMichigan
Coordinates46.00737, -88.03174
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating75.4 US tons
Inventory rating45.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length21 ft (6.3 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2014)
Projected traffic1,725 by 2034
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemNo

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-69 over N Br Sturgeon River built?

It was built in 1956, making it 69 years old in 2025.

What condition is M-69 over N Br Sturgeon 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 September 2024.

How much traffic does M-69 over N Br Sturgeon River carry?

About 1,500 vehicles per day (2014 count), of which roughly 8% are trucks.

How long is M-69 over N Br Sturgeon River?

The structure is 21 ft (6.3 m) long with a longest span of 10 ft (3 m).

Who owns M-69 over N Br Sturgeon River?

It is owned by the State Highway Agency.