US Bridges

M-33 over Cheboygan River

Fair

Cheboygan County, Michigan · 0.4 MI S of M-27 · Structure no. 000000000001498

Built
1958
67 years old, rebuilt 2008
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
199 ft
3 main spans
Daily traffic
6,873
2007 count
Owner
State
State Highway Agency

About this bridge

M-33 over Cheboygan River is a steel stringer/multi-beam or girder carrying M-33 over Cheboygan River in Cheboygan County, Michigan. It was built in 1958 and reconstructed in 2008, so it is 67 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 6,873 vehicles a day, roughly 1% of them trucks, projected to reach 8,545 by 2018. The structure is 199 ft (60.7 m) long and 37 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesM-33
CrossesCheboygan River
Location0.4 MI S of M-27
RouteState Highway 33
CountyCheboygan County
StateMichigan
Coordinates45.59516, -84.47412
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2023
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating90.4 US tons
Inventory rating54.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length199 ft (60.7 m)
Longest span70 ft (21.3 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,873 (2007)
Projected traffic8,545 by 2018
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was M-33 over Cheboygan River built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 2008.

What condition is M-33 over Cheboygan 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 2023.

How much traffic does M-33 over Cheboygan River carry?

About 6,873 vehicles per day (2007 count), of which roughly 1% are trucks.

How long is M-33 over Cheboygan River?

The structure is 199 ft (60.7 m) long with a longest span of 70 ft (21.3 m) and a deck 37 ft wide.

Who owns M-33 over Cheboygan River?

It is owned by the State Highway Agency.