US Bridges

I-75 SB over Charles Brink RD

Fair

Otsego County, Michigan · 5.1 MI S of M-32 · Structure no. 000000000008674

Built
1961
64 years old, rebuilt 1980
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
112 ft
3 main spans
Daily traffic
7,041
2007 count
Owner
State
State Highway Agency

About this bridge

I-75 SB over Charles Brink RD is a prestressed concrete stringer/multi-beam or girder carrying I-75 SB over Charles Brink RD in Otsego County, Michigan. It was built in 1961 and reconstructed in 1980, so it is 64 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 7,041 vehicles a day, roughly 10% of them trucks, projected to reach 11,274 by 2018. The structure is 112 ft (34.2 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-75 SB
CrossesCharles Brink RD
Location5.1 MI S of M-32
RouteInterstate 75
CountyOtsego County
StateMichigan
Coordinates44.9579, -84.67422
Functional classRural Principal Arterial - Interstate

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating68.2 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length112 ft (34.2 m)
Longest span40 ft (12.2 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,041 (2007)
Projected traffic11,274 by 2018
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-75 SB over Charles Brink RD built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1980.

What condition is I-75 SB over Charles Brink RD 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 I-75 SB over Charles Brink RD carry?

About 7,041 vehicles per day (2007 count), of which roughly 10% are trucks.

How long is I-75 SB over Charles Brink RD?

The structure is 112 ft (34.2 m) long with a longest span of 40 ft (12.2 m) and a deck 43 ft wide.

Who owns I-75 SB over Charles Brink RD?

It is owned by the State Highway Agency.