US Bridges

CR 450N over Clarkson Ditch

Fair

Montgomery County, Indiana · 00.75 W of CR 625 W · Structure no. 5400082

Built
1970
55 years old
Condition
Fair
inspected April 2024
Type
Slab
Concrete Continuous
Length
72 ft
3 main spans
Daily traffic
160
2022 count
Owner
County
County Highway Agency

About this bridge

CR 450N over Clarkson Ditch is a concrete continuous slab carrying CR 450N over Clarkson Ditch in Montgomery County, Indiana. It was built in 1970, so it is 55 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 160 vehicles a day, roughly 10% of them trucks, projected to reach 230 by 2042. The structure is 72 ft (21.9 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 450N
CrossesClarkson Ditch
Location00.75 W of CR 625 W
RouteCounty Highway 56
CountyMontgomery County
StateIndiana
Coordinates40.10265, -87.0358
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
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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating64.7 US tons
Inventory rating38.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length72 ft (21.9 m)
Longest span28 ft (8.5 m)
Deck width28 ft (8.6 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic160 (2022)
Projected traffic230 by 2042
Trucks10%
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 450N over Clarkson Ditch built?

It was built in 1970, making it 55 years old in 2025.

What condition is CR 450N over Clarkson Ditch 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 2024.

How much traffic does CR 450N over Clarkson Ditch carry?

About 160 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is CR 450N over Clarkson Ditch?

The structure is 72 ft (21.9 m) long with a longest span of 28 ft (8.5 m) and a deck 28 ft wide.

Who owns CR 450N over Clarkson Ditch?

It is owned by the County Highway Agency.