US Bridges

CR 450E over Little Flatrock River

Fair

Rush County, Indiana · 00.20 S of CR 200 S · Structure no. 7000148

Built
1900
125 years old, rebuilt 1967
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
37 ft
1 main span
Daily traffic
250
2019 count
Owner
County
County Highway Agency

About this bridge

CR 450E over Little Flatrock River is a prestressed concrete box beam or girders - multiple carrying CR 450E over Little Flatrock River in Rush County, Indiana. It was built in 1900 and reconstructed in 1967, 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 250 vehicles a day, roughly 5% of them trucks, projected to reach 325 by 2039. The structure is 37 ft (11.4 m) long and 20 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCR 450E
CrossesLittle Flatrock River
Location00.20 S of CR 200 S
RouteCounty Highway 91
CountyRush County
StateIndiana
Coordinates39.58172, -85.35835
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating64.2 US tons
Inventory rating38.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length37 ft (11.4 m)
Longest span34 ft (10.4 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2019)
Projected traffic325 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 450E over Little Flatrock River built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1967.

What condition is CR 450E over Little 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 May 2023.

How much traffic does CR 450E over Little Flatrock River carry?

About 250 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is CR 450E over Little Flatrock River?

The structure is 37 ft (11.4 m) long with a longest span of 34 ft (10.4 m) and a deck 20 ft wide.

Who owns CR 450E over Little Flatrock River?

It is owned by the County Highway Agency.