US Bridges

I-69 EB over Summers RD

Fair

Lapeer County, Michigan · 2.0 M SW of Imlay City · Structure no. 000000000005354

Built
1983
42 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
93 ft
1 main span
Daily traffic
17,578
2013 count
Owner
State
State Highway Agency

About this bridge

I-69 EB over Summers RD is a steel stringer/multi-beam or girder carrying I-69 EB over Summers RD in Lapeer County, Michigan. It was built in 1983, so it is 42 years old, younger 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 17,578 vehicles a day, roughly 20% of them trucks, projected to reach 20,215 by 2033. The structure is 93 ft (28.4 m) long and 48 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesI-69 EB
CrossesSummers RD
Location2.0 M SW of Imlay City
RouteInterstate 69
CountyLapeer County
StateMichigan
Coordinates42.99727, -83.10534
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating94.7 US tons
Inventory rating56.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length93 ft (28.4 m)
Longest span90 ft (27.4 m)
Deck width48 ft (14.6 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,578 (2013)
Projected traffic20,215 by 2033
Trucks20%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 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-69 EB over Summers RD built?

It was built in 1983, making it 42 years old in 2025.

What condition is I-69 EB over Summers 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 April 2023.

How much traffic does I-69 EB over Summers RD carry?

About 17,578 vehicles per day (2013 count), of which roughly 20% are trucks.

How long is I-69 EB over Summers RD?

The structure is 93 ft (28.4 m) long with a longest span of 90 ft (27.4 m) and a deck 48 ft wide.

Who owns I-69 EB over Summers RD?

It is owned by the State Highway Agency.