US Bridges

CR 400S over Flatrock River

Fair

Henry County, Indiana · 00.25 E of SR 103 · Structure no. 3300082

Built
1970
55 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete Continuous
Length
107 ft
3 main spans
Daily traffic
527
2021 count
Owner
County
County Highway Agency

About this bridge

CR 400S over Flatrock River is a concrete continuous slab carrying CR 400S over Flatrock River in Henry 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 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 527 vehicles a day, roughly 8% of them trucks, projected to reach 896 by 2041. The structure is 107 ft (32.6 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCR 400S
CrossesFlatrock River
Location00.25 E of SR 103
RouteCounty Highway 22
CountyHenry County
StateIndiana
Coordinates39.87331, -85.3477
Functional classRural Local

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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.2 US tons
Inventory rating40.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length107 ft (32.6 m)
Longest span41 ft (12.6 m)
Deck width29 ft (8.9 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic527 (2021)
Projected traffic896 by 2041
Trucks8%
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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$400,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 400S over Flatrock River built?

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

What condition is CR 400S 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 August 2023.

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

About 527 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is CR 400S over Flatrock River?

The structure is 107 ft (32.6 m) long with a longest span of 41 ft (12.6 m) and a deck 29 ft wide.

Who owns CR 400S over Flatrock River?

It is owned by the County Highway Agency.