US Bridges

CR 500N over Clarkson Ditch

Fair

Montgomery County, Indiana · 00.60 W of CR 600 W · Structure no. 5400084

Built
1987
38 years old
Condition
Fair
inspected April 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
43 ft
1 main span
Daily traffic
100
2024 count
Owner
County
County Highway Agency

About this bridge

CR 500N over Clarkson Ditch is a prestressed concrete box beam or girders - multiple carrying CR 500N over Clarkson Ditch in Montgomery County, Indiana. It was built in 1987, so it is 38 years old, younger 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 6 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 100 vehicles a day, roughly 5% of them trucks, projected to reach 150 by 2044. The structure is 43 ft (13 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCR 500N
CrossesClarkson Ditch
Location00.60 W of CR 600 W
RouteCounty Highway 306
StateIndiana
Coordinates40.11123, -87.02757
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.5 US tons
Inventory rating35.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length43 ft (13 m)
Longest span40 ft (12.3 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2024)
Projected traffic150 by 2044
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 500N over Clarkson Ditch built?

It was built in 1987, making it 38 years old in 2025.

What condition is CR 500N 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 500N over Clarkson Ditch carry?

About 100 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is CR 500N over Clarkson Ditch?

The structure is 43 ft (13 m) long with a longest span of 40 ft (12.3 m) and a deck 24 ft wide.

Who owns CR 500N over Clarkson Ditch?

It is owned by the County Highway Agency.