US Bridges

I-75 NB over CSX RR

Fair

Saginaw County, Michigan · 0.5 MI N of Genesee Col · Structure no. 000000000009189

Built
1958
67 years old, rebuilt 1998
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
231 ft
3 main spans
Daily traffic
29,274
2014 count
Owner
State
State Highway Agency

About this bridge

I-75 NB over CSX RR is a prestressed concrete box beam or girders - single or spread carrying I-75 NB over CSX RR in Saginaw County, Michigan. It was built in 1958 and reconstructed in 1998, 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 29,274 vehicles a day, roughly 7% of them trucks, projected to reach 33,665 by 2034. The structure is 231 ft (70.4 m) long and 74 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-75 NB
CrossesCSX RR
Location0.5 MI N of Genesee Col
RouteInterstate 75
CountySaginaw County
StateMichigan
Coordinates43.22659, -83.76894
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating65 US tons
Inventory rating29.7 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length231 ft (70.4 m)
Longest span77 ft (23.5 m)
Deck width74 ft (22.6 m)
Roadway width71 ft (21.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,274 (2014)
Projected traffic33,665 by 2034
Trucks7%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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 NB over CSX RR built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1998.

What condition is I-75 NB over CSX RR 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 2023.

How much traffic does I-75 NB over CSX RR carry?

About 29,274 vehicles per day (2014 count), of which roughly 7% are trucks.

How long is I-75 NB over CSX RR?

The structure is 231 ft (70.4 m) long with a longest span of 77 ft (23.5 m) and a deck 74 ft wide.

Who owns I-75 NB over CSX RR?

It is owned by the State Highway Agency.