US Bridges

I-75 SB over US-127 NB

Fair

Crawford County, Michigan · 5.3 MI S of Grayling · Structure no. 000000000002059

Built
1962
63 years old, rebuilt 1984
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
303 ft
3 main spans
Daily traffic
9,649
2007 count
Owner
State
State Highway Agency

About this bridge

I-75 SB over US-127 NB is a steel stringer/multi-beam or girder carrying I-75 SB over US-127 NB in Crawford County, Michigan. It was built in 1962 and reconstructed in 1984, so it is 63 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 9,649 vehicles a day, roughly 10% of them trucks, projected to reach 17,322 by 2018. The structure is 303 ft (92.4 m) long and 45 ft wide.

Location

Open in Google Maps
CarriesI-75 SB
CrossesUS-127 NB
Location5.3 MI S of Grayling
RouteInterstate 75
CountyCrawford County
StateMichigan
Coordinates44.57966, -84.70986
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 2023
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 geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating101.1 US tons
Inventory rating42.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length303 ft (92.4 m)
Longest span107 ft (32.6 m)
Deck width45 ft (13.8 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,649 (2007)
Projected traffic17,322 by 2018
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 US-127 NB built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1984.

What condition is I-75 SB over US-127 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 September 2023.

How much traffic does I-75 SB over US-127 NB carry?

About 9,649 vehicles per day (2007 count), of which roughly 10% are trucks.

How long is I-75 SB over US-127 NB?

The structure is 303 ft (92.4 m) long with a longest span of 107 ft (32.6 m) and a deck 45 ft wide.

Who owns I-75 SB over US-127 NB?

It is owned by the State Highway Agency.