US Bridges

CR 400N over Little Blue River

FairPosted for load

Rush County, Indiana · 00.80 E of CR 550 W · Structure no. 7000106

Built
1920
105 years old, rebuilt 1993
Condition
Fair
inspected April 2023
Type
Arch - Deck
Concrete
Length
85 ft
1 main span
Daily traffic
100
2019 count
Owner
County
County Highway Agency

About this bridge

CR 400N over Little Blue River is a concrete arch - deck carrying CR 400N over Little Blue River in Rush County, Indiana. It was built in 1920 and reconstructed in 1993, so it is 105 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 100 vehicles a day, roughly 5% of them trucks, projected to reach 150 by 2039. The structure is 85 ft (25.9 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCR 400N
CrossesLittle Blue River
Location00.80 E of CR 550 W
RouteCounty Highway 46
CountyRush County
StateIndiana
Coordinates39.6692, -85.53253
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.1 US tons
Inventory rating24.6 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length85 ft (25.9 m)
Longest span75 ft (22.8 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2019)
Projected traffic150 by 2039
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 400N over Little Blue River built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1993.

What condition is CR 400N over Little Blue River 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 April 2023.

How much traffic does CR 400N over Little Blue River carry?

About 100 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is CR 400N over Little Blue River?

The structure is 85 ft (25.9 m) long with a longest span of 75 ft (22.8 m) and a deck 24 ft wide.

Who owns CR 400N over Little Blue River?

It is owned by the County Highway Agency.