US Bridges

CR 900N over Flatrock River

PoorPosted for load

Bartholomew County, Indiana · 00.61 E of CR 200 E · Structure no. 0300068

Built
1911
114 years old, rebuilt 1997
Condition
Poor
inspected June 2024
Type
Truss - Thru
Steel
Length
260 ft
2 main spans
Daily traffic
360
2022 count
Owner
County
County Highway Agency

About this bridge

CR 900N over Flatrock River is a steel truss - thru carrying CR 900N over Flatrock River in Bartholomew County, Indiana. It was built in 1911 and reconstructed in 1997, so it is 114 years old, older than the Indiana average of 46.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 360 vehicles a day, roughly 5% of them trucks, projected to reach 540 by 2038. The structure is 260 ft (79.2 m) long and 16 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesCR 900N
CrossesFlatrock River
Location00.61 E of CR 200 E
RouteCounty Highway 454
StateIndiana
Coordinates39.33372, -85.86446
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
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 inspectionJune 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating14.4 US tons
Inventory rating11.1 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckOpen grating
Main spans2
Design loadUnknown
Structure length260 ft (79.2 m)
Longest span126 ft (38.5 m)
Deck width16 ft (4.8 m)
Roadway width15 ft (4.6 m)
Vertical clearance over deck12 ft (3.6 m)

Traffic and service

Average daily traffic360 (2022)
Projected traffic540 by 2038
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 900N over Flatrock River built?

It was built in 1911, making it 114 years old in 2025. It was reconstructed in 1997.

What condition is CR 900N over Flatrock River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.

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

About 360 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is CR 900N over Flatrock River?

The structure is 260 ft (79.2 m) long with a longest span of 126 ft (38.5 m) and a deck 16 ft wide.

Who owns CR 900N over Flatrock River?

It is owned by the County Highway Agency.