US Bridges

I-75 SB over D&m RR (abn)

Fair

Cheboygan County, Michigan · 1.9 MI S of M-27 · Structure no. 000000000001506

Built
1962
63 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
188 ft
3 main spans
Daily traffic
4,474
2007 count
Owner
State
State Highway Agency

About this bridge

I-75 SB over D&m RR (abn) is a steel stringer/multi-beam or girder carrying I-75 SB over D&m RR (abn) in Cheboygan County, Michigan. It was built in 1962, 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 4,474 vehicles a day, roughly 11% of them trucks, projected to reach 5,599 by 2018. The structure is 188 ft (57.2 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-75 SB
CrossesD&m RR (abn)
Location1.9 MI S of M-27
RouteInterstate 75
CountyCheboygan County
StateMichigan
Coordinates45.43144, -84.60626
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 inspectionApril 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 alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating63.6 US tons
Inventory rating38.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length188 ft (57.2 m)
Longest span62 ft (19 m)
Deck width47 ft (14.4 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,474 (2007)
Projected traffic5,599 by 2018
Trucks11%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
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 proposedDeck replacement with only incidental widening
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-75 SB over D&m RR (abn) built?

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

What condition is I-75 SB over D&m RR (abn) 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 April 2023.

How much traffic does I-75 SB over D&m RR (abn) carry?

About 4,474 vehicles per day (2007 count), of which roughly 11% are trucks.

How long is I-75 SB over D&m RR (abn)?

The structure is 188 ft (57.2 m) long with a longest span of 62 ft (19 m) and a deck 47 ft wide.

Who owns I-75 SB over D&m RR (abn)?

It is owned by the State Highway Agency.