US Bridges

CR 420 W over I-74

Fair

Decatur County, Indiana · 03.75 W US 421 · Structure no. 045040

Built
1961
64 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Concrete Continuous
Length
225 ft
4 main spans
Daily traffic
440
2019 count
Owner
State
State Highway Agency

About this bridge

CR 420 W over I-74 is a concrete continuous stringer/multi-beam or girder carrying CR 420 W over I-74 in Decatur County, Indiana. It was built in 1961, so it is 64 years old, older 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 440 vehicles a day, roughly 9% of them trucks, projected to reach 470 by 2039. The structure is 225 ft (68.7 m) long and 29 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesCR 420 W
CrossesI-74
Location03.75 W US 421
RouteCounty Highway 0
CountyDecatur County
StateIndiana
Coordinates39.40499, -85.55906
Functional classRural Minor 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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.4 US tons
Inventory rating39.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length225 ft (68.7 m)
Longest span70 ft (21.3 m)
Deck width29 ft (8.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic440 (2019)
Projected traffic470 by 2039
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.7 mi (14 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was CR 420 W over I-74 built?

It was built in 1961, making it 64 years old in 2025.

What condition is CR 420 W over I-74 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 March 2024.

How much traffic does CR 420 W over I-74 carry?

About 440 vehicles per day (2019 count), of which roughly 9% are trucks.

How long is CR 420 W over I-74?

The structure is 225 ft (68.7 m) long with a longest span of 70 ft (21.3 m) and a deck 29 ft wide.

Who owns CR 420 W over I-74?

It is owned by the State Highway Agency.