US Bridges

CR 300N over Flatrock River

Fair

Henry County, Indiana · 00.25 E of Wilbur Wright · Structure no. 3300051

Built
1957
68 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete Continuous
Length
62 ft
3 main spans
Daily traffic
417
2021 count
Owner
County
County Highway Agency

About this bridge

CR 300N over Flatrock River is a concrete continuous slab carrying CR 300N over Flatrock River in Henry County, Indiana. It was built in 1957, so it is 68 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 417 vehicles a day, roughly 8% of them trucks, projected to reach 625 by 2041. The structure is 62 ft (18.8 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCR 300N
CrossesFlatrock River
Location00.25 E of Wilbur Wright
RouteCounty Highway 52
CountyHenry County
StateIndiana
Coordinates39.97522, -85.24739
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 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 within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
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 rating74 US tons
Inventory rating44.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length62 ft (18.8 m)
Longest span24 ft (7.3 m)
Deck width26 ft (7.8 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic417 (2021)
Projected traffic625 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$175,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 300N over Flatrock River built?

It was built in 1957, making it 68 years old in 2025.

What condition is CR 300N 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 300N over Flatrock River carry?

About 417 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is CR 300N over Flatrock River?

The structure is 62 ft (18.8 m) long with a longest span of 24 ft (7.3 m) and a deck 26 ft wide.

Who owns CR 300N over Flatrock River?

It is owned by the County Highway Agency.