US Bridges

I-69 SB over Charlotte Southern RR

Fair

Eaton County, Michigan · E Lts of Charlotte · Structure no. 000000000002250

Built
1971
54 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
143 ft
3 main spans
Daily traffic
16,775
2020 count
Owner
State
State Highway Agency

About this bridge

I-69 SB over Charlotte Southern RR is a steel stringer/multi-beam or girder carrying I-69 SB over Charlotte Southern RR in Eaton County, Michigan. It was built in 1971, so it is 54 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 16,775 vehicles a day, roughly 23% of them trucks, projected to reach 18,535 by 2040. The structure is 143 ft (43.6 m) long and 64 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-69 SB
CrossesCharlotte Southern RR
LocationE Lts of Charlotte
RouteInterstate 69
CountyEaton County
StateMichigan
Coordinates42.55751, -84.82114
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 inspectionMay 2023
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 alignment8: Equal to present desirable criteria
Operating rating58.5 US tons
Inventory rating35.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length143 ft (43.6 m)
Longest span48 ft (14.6 m)
Deck width64 ft (19.5 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,775 (2020)
Projected traffic18,535 by 2040
Trucks23%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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 SB over Charlotte Southern RR built?

It was built in 1971, making it 54 years old in 2025.

What condition is I-69 SB over Charlotte Southern RR 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 May 2023.

How much traffic does I-69 SB over Charlotte Southern RR carry?

About 16,775 vehicles per day (2020 count), of which roughly 23% are trucks.

How long is I-69 SB over Charlotte Southern RR?

The structure is 143 ft (43.6 m) long with a longest span of 48 ft (14.6 m) and a deck 64 ft wide.

Who owns I-69 SB over Charlotte Southern RR?

It is owned by the State Highway Agency.