US Bridges

CR 500S over Flatrock River

Fair

Henry County, Indiana · 00.50 E of SR 103 · Structure no. 3300129

Built
1959
66 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete Continuous
Length
102 ft
3 main spans
Daily traffic
475
2019 count
Owner
County
County Highway Agency

About this bridge

CR 500S over Flatrock River is a concrete continuous slab carrying CR 500S over Flatrock River in Henry County, Indiana. It was built in 1959, so it is 66 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 475 vehicles a day, roughly 6% of them trucks, projected to reach 800 by 2039. The structure is 102 ft (31.2 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCR 500S
CrossesFlatrock River
Location00.50 E of SR 103
RouteCounty Highway 18
CountyHenry County
StateIndiana
Coordinates39.86013, -85.34796
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
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 rating65.8 US tons
Inventory rating39.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length102 ft (31.2 m)
Longest span39 ft (12 m)
Deck width28 ft (8.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic475 (2019)
Projected traffic800 by 2039
Trucks6%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 500S over Flatrock River built?

It was built in 1959, making it 66 years old in 2025.

What condition is CR 500S 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 500S over Flatrock River carry?

About 475 vehicles per day (2019 count), of which roughly 6% are trucks.

How long is CR 500S over Flatrock River?

The structure is 102 ft (31.2 m) long with a longest span of 39 ft (12 m) and a deck 28 ft wide.

Who owns CR 500S over Flatrock River?

It is owned by the County Highway Agency.