US Bridges

CR 900N over Flatrock River

Fair

Rush County, Indiana · 00.20 E of CR 400 E · Structure no. 7000033

Built
1900
125 years old, rebuilt 1956
Condition
Fair
inspected April 2023
Type
Slab
Concrete Continuous
Length
103 ft
3 main spans
Daily traffic
444
2019 count
Owner
County
County Highway Agency

About this bridge

CR 900N over Flatrock River is a concrete continuous slab carrying CR 900N over Flatrock River in Rush County, Indiana. It was built in 1900 and reconstructed in 1956, so it is 125 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 444 vehicles a day, roughly 5% of them trucks, projected to reach 590 by 2039. The structure is 103 ft (31.3 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 900N
CrossesFlatrock River
Location00.20 E of CR 400 E
RouteCounty Highway 68
CountyRush County
StateIndiana
Coordinates39.74379, -85.36709
Functional classRural Major 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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating35.9 US tons
Inventory rating28 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length103 ft (31.3 m)
Longest span40 ft (12.1 m)
Deck width28 ft (8.6 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic444 (2019)
Projected traffic590 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 900N over Flatrock River built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1956.

What condition is CR 900N 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 April 2023.

How much traffic does CR 900N over Flatrock River carry?

About 444 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is CR 900N over Flatrock River?

The structure is 103 ft (31.3 m) long with a longest span of 40 ft (12.1 m) and a deck 28 ft wide.

Who owns CR 900N over Flatrock River?

It is owned by the County Highway Agency.