US Bridges

I-69 WB Ramp C over Miller RD

Fair

Genesee County, Michigan · In Swartz Creek · Structure no. 000000000002555

Built
1968
57 years old, rebuilt 1991
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
195 ft
4 main spans
Daily traffic
7,200
1988 count
Owner
State
State Highway Agency

About this bridge

I-69 WB Ramp C over Miller RD is a steel stringer/multi-beam or girder carrying I-69 WB Ramp C over Miller RD in Genesee County, Michigan. It was built in 1968 and reconstructed in 1991, 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 7,200 vehicles a day, roughly 11% of them trucks, projected to reach 8,280 by 2008. The structure is 195 ft (59.4 m) long and 27 ft wide.

Location

Open in Google Maps
CarriesI-69 WB Ramp C
CrossesMiller RD
LocationIn Swartz Creek
RouteInterstate 69
CountyGenesee County
StateMichigan
Coordinates42.96619, -83.80736
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating105.1 US tons
Inventory rating62.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length195 ft (59.4 m)
Longest span56 ft (17 m)
Deck width27 ft (8.2 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,200 (1988)
Projected traffic8,280 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-69 WB Ramp C over Miller RD built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1991.

What condition is I-69 WB Ramp C 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 WB Ramp C over Miller RD carry?

About 7,200 vehicles per day (1988 count), of which roughly 11% are trucks.

How long is I-69 WB Ramp C over Miller RD?

The structure is 195 ft (59.4 m) long with a longest span of 56 ft (17 m) and a deck 27 ft wide.

Who owns I-69 WB Ramp C over Miller RD?

It is owned by the State Highway Agency.