US Bridges

US-23 over Black Mallard River

Fair

Presque Isle County, Michigan · 9.7 MI SE Cheboygan Col · Structure no. 000000000008966

Built
1940
85 years old
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete
Length
30 ft
1 main span
Daily traffic
1,261
2022 count
Owner
State
State Highway Agency

About this bridge

US-23 over Black Mallard River is a concrete tee beam carrying US-23 over Black Mallard River in Presque Isle County, Michigan. It was built in 1940, so it is 85 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 5 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 1,261 vehicles a day, roughly 4% of them trucks. The structure is 30 ft (9.1 m) long and 40 ft wide. If it were closed, the detour would be 29.2 mi (47 km).

CarriesUS-23
CrossesBlack Mallard River
Location9.7 MI SE Cheboygan Col
RouteU.S. Route 23
Coordinates45.53666, -84.12938
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 23 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.3 US tons
Inventory rating38.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length30 ft (9.1 m)
Longest span27 ft (8.1 m)
Deck width40 ft (12.1 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,261 (2022)
Projected traffic—
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.2 mi (47 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 over Black Mallard River built?

It was built in 1940, making it 85 years old in 2025.

What condition is US-23 over Black Mallard 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 June 2024.

How much traffic does US-23 over Black Mallard River carry?

About 1,261 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is US-23 over Black Mallard River?

The structure is 30 ft (9.1 m) long with a longest span of 27 ft (8.1 m) and a deck 40 ft wide.

Who owns US-23 over Black Mallard River?

It is owned by the State Highway Agency.