US Bridges

I-75 Bl|old 27 over I-75 NB

Fair

Otsego County, Michigan · 2.7 MI S of M-32 · Structure no. 000000000008676

Built
1961
64 years old, rebuilt 1976
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
264 ft
4 main spans
Daily traffic
12,725
2024 count
Owner
State
State Highway Agency

About this bridge

I-75 Bl|old 27 over I-75 NB is a steel stringer/multi-beam or girder carrying I-75 Bl|old 27 over I-75 NB in Otsego County, Michigan. It was built in 1961 and reconstructed in 1976, 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 12,725 vehicles a day, roughly 3% of them trucks, projected to reach 14,050 by 2044. The structure is 264 ft (80.6 m) long and 73 ft wide.

Location

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CarriesI-75 Bl|old 27
CrossesI-75 NB
Location2.7 MI S of M-32
RouteU.S. Route 75
CountyOtsego County
StateMichigan
Coordinates44.98788, -84.67716
Functional classUrban Other Principal 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionOctober 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating70 US tons
Inventory rating26.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length264 ft (80.6 m)
Longest span91 ft (27.8 m)
Deck width73 ft (22.3 m)
Roadway width70 ft (21.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,725 (2024)
Projected traffic14,050 by 2044
Trucks3%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-75 Bl|old 27 over I-75 NB built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1976.

What condition is I-75 Bl|old 27 over I-75 NB 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 October 2024.

How much traffic does I-75 Bl|old 27 over I-75 NB carry?

About 12,725 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is I-75 Bl|old 27 over I-75 NB?

The structure is 264 ft (80.6 m) long with a longest span of 91 ft (27.8 m) and a deck 73 ft wide.

Who owns I-75 Bl|old 27 over I-75 NB?

It is owned by the State Highway Agency.