US Bridges

CR 427 over Diehl Ditch

Fair

DeKalb County, Indiana · 00.01 N of CR 50 · Structure no. 1700024

Built
1980
45 years old
Condition
Fair
inspected October 2024
Type
Slab
Concrete Continuous
Length
100 ft
3 main spans
Daily traffic
5,350
2024 count
Owner
County
County Highway Agency

About this bridge

CR 427 over Diehl Ditch is a concrete continuous slab carrying CR 427 over Diehl Ditch in DeKalb County, Indiana. It was built in 1980, so it is 45 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 5,350 vehicles a day, roughly 12% of them trucks, projected to reach 7,275 by 2044. The structure is 100 ft (30.4 m) long and 38 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesCR 427
CrossesDiehl Ditch
Location00.01 N of CR 50
RouteCounty Highway 271
CountyDeKalb County
StateIndiana
Coordinates41.34382, -85.06391
Functional classRural Major 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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.9 US tons
Inventory rating22.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length100 ft (30.4 m)
Longest span39 ft (11.8 m)
Deck width38 ft (11.7 m)
Roadway width35 ft (10.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,350 (2024)
Projected traffic7,275 by 2044
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 CR 427 over Diehl Ditch built?

It was built in 1980, making it 45 years old in 2025.

What condition is CR 427 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 October 2024.

How much traffic does CR 427 over Diehl Ditch carry?

About 5,350 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is CR 427 over Diehl Ditch?

The structure is 100 ft (30.4 m) long with a longest span of 39 ft (11.8 m) and a deck 38 ft wide.

Who owns CR 427 over Diehl Ditch?

It is owned by the County Highway Agency.