US Bridges

I-75 Ramps H & M over I-69 Ramp L

Poor

Genesee County, Michigan · WB I-69 Ramp to NB I-75 · Structure no. 000000000002556

Built
1969
56 years old
Condition
Poor
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
211 ft
3 main spans
Daily traffic
6,800
1988 count
Owner
State
State Highway Agency

About this bridge

I-75 Ramps H & M over I-69 Ramp L is a steel stringer/multi-beam or girder carrying I-75 Ramps H & M over I-69 Ramp L in Genesee County, Michigan. It was built in 1969, so it is 56 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 6,800 vehicles a day, roughly 11% of them trucks, projected to reach 7,820 by 2008. The structure is 211 ft (64.3 m) long and 28 ft wide.

CarriesI-75 Ramps H & M
CrossesI-69 Ramp L
LocationWB I-69 Ramp to NB I-75
RouteInterstate 75
Coordinates42.98629, -83.73407
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 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 geometry7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating72.1 US tons
Inventory rating43.2 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length211 ft (64.3 m)
Longest span75 ft (22.8 m)
Deck width28 ft (8.6 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,800 (1988)
Projected traffic7,820 by 2008
Trucks11%
Lanes on structure1
Traffic directionOne-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 proposedDeck replacement with only incidental widening
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-75 Ramps H & M over I-69 Ramp L built?

It was built in 1969, making it 56 years old in 2025.

What condition is I-75 Ramps H & M over I-69 Ramp L in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.

How much traffic does I-75 Ramps H & M over I-69 Ramp L carry?

About 6,800 vehicles per day (1988 count), of which roughly 11% are trucks.

How long is I-75 Ramps H & M over I-69 Ramp L?

The structure is 211 ft (64.3 m) long with a longest span of 75 ft (22.8 m) and a deck 28 ft wide.

Who owns I-75 Ramps H & M over I-69 Ramp L?

It is owned by the State Highway Agency.