US Bridges

I-75 SB over Cook RD

Fair

Genesee County, Michigan · 3.0 MI NW of Oakland Col · Structure no. 000000000002628

Built
1962
63 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
120 ft
3 main spans
Daily traffic
40,700
2013 count
Owner
State
State Highway Agency

About this bridge

I-75 SB over Cook RD is a steel stringer/multi-beam or girder carrying I-75 SB over Cook RD in Genesee 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 40,700 vehicles a day, roughly 6% of them trucks, projected to reach 38,551 by 2018. The structure is 120 ft (36.7 m) long and 55 ft wide.

Location

Open in Google Maps
CarriesI-75 SB
CrossesCook RD
Location3.0 MI NW of Oakland Col
RouteInterstate 75
CountyGenesee County
StateMichigan
Coordinates42.90269, -83.64849
Functional classUrban 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.
Substructure7 GoodSome minor problems.
Last inspectionJune 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 alignment8: Equal to present desirable criteria
Operating rating57.9 US tons
Inventory rating34.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length120 ft (36.7 m)
Longest span45 ft (13.7 m)
Deck width55 ft (16.9 m)
Roadway width51 ft (15.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40,700 (2013)
Projected traffic38,551 by 2018
Trucks6%
Lanes on structure3
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 proposedDeck replacement with only incidental widening
Estimated improvement cost$223,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-75 SB over Cook RD built?

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

What condition is I-75 SB over Cook 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 June 2024.

How much traffic does I-75 SB over Cook RD carry?

About 40,700 vehicles per day (2013 count), of which roughly 6% are trucks.

How long is I-75 SB over Cook RD?

The structure is 120 ft (36.7 m) long with a longest span of 45 ft (13.7 m) and a deck 55 ft wide.

Who owns I-75 SB over Cook RD?

It is owned by the State Highway Agency.