US Bridges

I-69 NB over CSX RR John Diehl Dt

Good

DeKalb County, Indiana · 01.02 S SR 8 · Structure no. 040610

Built
1963
62 years old, rebuilt 2017
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
258 ft
5 main spans
Daily traffic
15,519
2020 count
Owner
State
State Highway Agency

About this bridge

I-69 NB over CSX RR John Diehl Dt is a steel continuous stringer/multi-beam or girder carrying I-69 NB over CSX RR John Diehl Dt in DeKalb County, Indiana. It was built in 1963 and reconstructed in 2017, so it is 62 years old, older than the Indiana average of 46.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 15,519 vehicles a day, roughly 22% of them trucks, projected to reach 19,090 by 2037. The structure is 258 ft (78.6 m) long and 44 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI-69 NB
CrossesCSX RR John Diehl Dt
Location01.02 S SR 8
RouteInterstate 69
StateIndiana
Coordinates41.35316, -85.08762
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating45.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length258 ft (78.6 m)
Longest span55 ft (16.7 m)
Deck width44 ft (13.3 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,519 (2020)
Projected traffic19,090 by 2037
Trucks22%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed0.6 mi (1 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-69 NB over CSX RR John Diehl Dt built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 2017.

What condition is I-69 NB over CSX RR John Diehl Dt in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2023.

How much traffic does I-69 NB over CSX RR John Diehl Dt carry?

About 15,519 vehicles per day (2020 count), of which roughly 22% are trucks.

How long is I-69 NB over CSX RR John Diehl Dt?

The structure is 258 ft (78.6 m) long with a longest span of 55 ft (16.7 m) and a deck 44 ft wide.

Who owns I-69 NB over CSX RR John Diehl Dt?

It is owned by the State Highway Agency.