US Bridges

US-23 NB over N Branch Pine River

Fair

Arenac County, Michigan · 1.0 MI W of M-13 · Structure no. 000000000000380

Built
1968
57 years old
Condition
Fair
inspected May 2024
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
4,566
2007 count
Owner
State
State Highway Agency

About this bridge

US-23 NB over N Branch Pine River is a concrete continuous culvert carrying US-23 NB over N Branch Pine River in Arenac County, Michigan. It was built in 1968, so it is 57 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 4,566 vehicles a day, roughly 8% of them trucks, projected to reach 7,057 by 2018. The structure is 21 ft (6.3 m) long. If it were closed, the detour would be 6.2 mi (10 km).

CarriesUS-23 NB
CrossesN Branch Pine River
Location1.0 MI W of M-13
RouteU.S. Route 23
Coordinates43.94954, -83.98557
Functional classRural Principal Arterial - Other

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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 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 rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 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 traffic4,566 (2007)
Projected traffic7,057 by 2018
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 US-23 NB over N Branch Pine River built?

It was built in 1968, making it 57 years old in 2025.

What condition is US-23 NB over N Branch Pine 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 US-23 NB over N Branch Pine River carry?

About 4,566 vehicles per day (2007 count), of which roughly 8% are trucks.

How long is US-23 NB over N Branch Pine River?

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

Who owns US-23 NB over N Branch Pine River?

It is owned by the State Highway Agency.