US Bridges

CR 300N over Flatrock River

FairPosted for load

Rush County, Indiana · 00.50 E of CR 125 E · Structure no. 7000090

Built
1916
109 years old, rebuilt 2004
Condition
Fair
inspected April 2023
Type
Truss - Thru
Wood or Timber
Length
155 ft
1 main span
Daily traffic
150
2019 count
Owner
County
County Highway Agency

About this bridge

CR 300N over Flatrock River is a wood or timber truss - thru carrying CR 300N over Flatrock River in Rush County, Indiana. It was built in 1916 and reconstructed in 2004, so it is 109 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. Its operating status is: posted for load restriction.

It carries about 150 vehicles a day, roughly 5% of them trucks, projected to reach 200 by 2039. The structure is 155 ft (47.2 m) long and 16 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCR 300N
CrossesFlatrock River
Location00.50 E of CR 125 E
RouteCounty Highway 42
CountyRush County
StateIndiana
Coordinates39.6554, -85.4095
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
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating9.9 US tons
Inventory rating9.9 US tons

Structure

Structure typeTruss - Thru
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length155 ft (47.2 m)
Longest span148 ft (45.1 m)
Deck width16 ft (4.8 m)
Roadway width14 ft (4.4 m)
Vertical clearance over deck12 ft (3.8 m)

Traffic and service

Average daily traffic150 (2019)
Projected traffic200 by 2039
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 statusListed on the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$771,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 300N over Flatrock River built?

It was built in 1916, making it 109 years old in 2025. It was reconstructed in 2004.

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 April 2023.

How much traffic does CR 300N over Flatrock River carry?

About 150 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is CR 300N over Flatrock River?

The structure is 155 ft (47.2 m) long with a longest span of 148 ft (45.1 m) and a deck 16 ft wide.

Who owns CR 300N over Flatrock River?

It is owned by the County Highway Agency.