US Bridges

CR 400E over Flatrock River

Fair

Rush County, Indiana · 00.20 S of CR 550 N · Structure no. 7000076

Built
1970
55 years old
Condition
Fair
inspected May 2023
Type
Channel Beam
Concrete
Length
120 ft
3 main spans
Daily traffic
250
2019 count
Owner
County
County Highway Agency

About this bridge

CR 400E over Flatrock River is a concrete channel beam carrying CR 400E over Flatrock River in Rush County, Indiana. It was built in 1970, so it is 55 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.

It carries about 250 vehicles a day, roughly 5% of them trucks, projected to reach 325 by 2039. The structure is 120 ft (36.5 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 400E
CrossesFlatrock River
Location00.20 S of CR 550 N
RouteCounty Highway 184
CountyRush County
StateIndiana
Coordinates39.69327, -85.37078
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating75.3 US tons
Inventory rating45.1 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length120 ft (36.5 m)
Longest span40 ft (12.1 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2019)
Projected traffic325 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 statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.9 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 400E over Flatrock River built?

It was built in 1970, making it 55 years old in 2025.

What condition is CR 400E over Flatrock 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 May 2023.

How much traffic does CR 400E over Flatrock River carry?

About 250 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is CR 400E over Flatrock River?

The structure is 120 ft (36.5 m) long with a longest span of 40 ft (12.1 m) and a deck 24 ft wide.

Who owns CR 400E over Flatrock River?

It is owned by the County Highway Agency.