US Bridges

I-69 NB over Conrail (abn)

Fair

Calhoun County, Michigan · 2.3 MI N of Branch Col · Structure no. 000000000001223

Built
1968
57 years old, rebuilt 2003
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
140 ft
3 main spans
Daily traffic
19,534
2014 count
Owner
State
State Highway Agency

About this bridge

I-69 NB over Conrail (abn) is a steel stringer/multi-beam or girder carrying I-69 NB over Conrail (abn) in Calhoun County, Michigan. It was built in 1968 and reconstructed in 2003, 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 19,534 vehicles a day, roughly 26% of them trucks, projected to reach 22,464 by 2034. The structure is 140 ft (42.7 m) long and 58 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesI-69 NB
CrossesConrail (abn)
Location2.3 MI N of Branch Col
RouteInterstate 69
CountyCalhoun County
StateMichigan
Coordinates42.10027, -84.99648
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionJune 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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88.2 US tons
Inventory rating52.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length140 ft (42.7 m)
Longest span52 ft (15.8 m)
Deck width58 ft (17.8 m)
Roadway width55 ft (16.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,534 (2014)
Projected traffic22,464 by 2034
Trucks26%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
Detour if closed1.9 mi (3 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 NB over Conrail (abn) built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 2003.

What condition is I-69 NB over Conrail (abn) 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 June 2023.

How much traffic does I-69 NB over Conrail (abn) carry?

About 19,534 vehicles per day (2014 count), of which roughly 26% are trucks.

How long is I-69 NB over Conrail (abn)?

The structure is 140 ft (42.7 m) long with a longest span of 52 ft (15.8 m) and a deck 58 ft wide.

Who owns I-69 NB over Conrail (abn)?

It is owned by the State Highway Agency.