US Bridges

Lahring RD over I-75

Fair

Oakland County, Michigan · 2.2 MI SE of Genesee Col · Structure no. 000000000008038

Built
1962
63 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
214 ft
4 main spans
Daily traffic
1,470
1974 count
Owner
State
State Highway Agency

About this bridge

Lahring RD over I-75 is a prestressed concrete stringer/multi-beam or girder carrying Lahring RD over I-75 in Oakland 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 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 1,470 vehicles a day, projected to reach 1,470 by 1977. The structure is 214 ft (65.2 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesLahring RD
CrossesI-75
Location2.2 MI SE of Genesee Col
RouteCounty Highway 0
CountyOakland County
StateMichigan
Coordinates42.84393, -83.58485
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.5 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length214 ft (65.2 m)
Longest span70 ft (21.4 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,470 (1974)
Projected traffic1,470 by 1977
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

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 Lahring RD over I-75 built?

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

What condition is Lahring RD over I-75 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 December 2024.

How much traffic does Lahring RD over I-75 carry?

About 1,470 vehicles per day (1974 count).

How long is Lahring RD over I-75?

The structure is 214 ft (65.2 m) long with a longest span of 70 ft (21.4 m) and a deck 31 ft wide.

Who owns Lahring RD over I-75?

It is owned by the State Highway Agency.