US Bridges

SR 8 over Diehl Ditch

Fair

DeKalb County, Indiana · 00.96 W I-69 · Structure no. 002280

Built
1986
39 years old, rebuilt 2013
Condition
Fair
inspected September 2024
Type
Slab
Concrete Continuous
Length
83 ft
3 main spans
Daily traffic
12,858
2021 count
Owner
State
State Highway Agency

About this bridge

SR 8 over Diehl Ditch is a concrete continuous slab carrying SR 8 over Diehl Ditch in DeKalb County, Indiana. It was built in 1986 and reconstructed in 2013, so it is 39 years old, younger than the Indiana average of 46.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 12,858 vehicles a day, roughly 9% of them trucks, projected to reach 24,425 by 2034. The structure is 83 ft (25.2 m) long and 48 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSR 8
CrossesDiehl Ditch
Location00.96 W I-69
RouteState Highway 8
CountyDeKalb County
StateIndiana
Coordinates41.36667, -85.10043
Functional classUrban Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.5 US tons
Inventory rating32.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length83 ft (25.2 m)
Longest span31 ft (9.6 m)
Deck width48 ft (14.6 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,858 (2021)
Projected traffic24,425 by 2034
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

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 SR 8 over Diehl Ditch built?

It was built in 1986, making it 39 years old in 2025. It was reconstructed in 2013.

What condition is SR 8 over Diehl Ditch 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 September 2024.

How much traffic does SR 8 over Diehl Ditch carry?

About 12,858 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is SR 8 over Diehl Ditch?

The structure is 83 ft (25.2 m) long with a longest span of 31 ft (9.6 m) and a deck 48 ft wide.

Who owns SR 8 over Diehl Ditch?

It is owned by the State Highway Agency.