US Bridges

I-69 EB over Miller RD

Fair

Genesee County, Michigan · In Swartz Creek · Structure no. 000000000002552

Built
1968
57 years old, rebuilt 2006
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
233 ft
4 main spans
Daily traffic
19,829
2007 count
Owner
State
State Highway Agency

About this bridge

I-69 EB over Miller RD is a steel stringer/multi-beam or girder carrying I-69 EB over Miller RD in Genesee County, Michigan. It was built in 1968 and reconstructed in 2006, so it is 57 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 19,829 vehicles a day, roughly 14% of them trucks, projected to reach 24,684 by 2018. The structure is 233 ft (71.1 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-69 EB
CrossesMiller RD
LocationIn Swartz Creek
RouteInterstate 69
CountyGenesee County
StateMichigan
Coordinates42.96585, -83.80816
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length233 ft (71.1 m)
Longest span67 ft (20.3 m)
Deck width48 ft (14.5 m)
Roadway width45 ft (13.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,829 (2007)
Projected traffic24,684 by 2018
Trucks14%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 proposedDeck replacement with only incidental widening
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-69 EB over Miller RD built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 2006.

What condition is I-69 EB over Miller 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 July 2024.

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

About 19,829 vehicles per day (2007 count), of which roughly 14% are trucks.

How long is I-69 EB over Miller RD?

The structure is 233 ft (71.1 m) long with a longest span of 67 ft (20.3 m) and a deck 48 ft wide.

Who owns I-69 EB over Miller RD?

It is owned by the State Highway Agency.