US Bridges

Thompson RD over Harting Ditch

Fair

Marion County, Indiana · 00.15 W of Arlington Ave · Structure no. 4900614

Built
1965
60 years old, rebuilt 1980
Condition
Fair
inspected July 2024
Type
Culvert
Steel
Length
38 ft
3 main spans
Daily traffic
23,772
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

Thompson RD over Harting Ditch is a steel culvert carrying Thompson RD over Harting Ditch in Marion County, Indiana. It was built in 1965 and reconstructed in 1980, so it is 60 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 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 23,772 vehicles a day, roughly 5% of them trucks, projected to reach 35,324 by 2039. The structure is 38 ft (11.5 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesThompson RD
CrossesHarting Ditch
Location00.15 W of Arlington Ave
RouteCity Street 0
CountyMarion County
StateIndiana
Coordinates39.69485, -86.06693
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.1 US tons
Inventory rating35.9 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadUnknown
Structure length38 ft (11.5 m)
Longest span9 ft (2.7 m)
Deck width27 ft (8.2 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,772 (2019)
Projected traffic35,324 by 2039
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Thompson RD over Harting Ditch built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1980.

What condition is Thompson RD over Harting 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 July 2024.

How much traffic does Thompson RD over Harting Ditch carry?

About 23,772 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is Thompson RD over Harting Ditch?

The structure is 38 ft (11.5 m) long with a longest span of 9 ft (2.7 m) and a deck 27 ft wide.

Who owns Thompson RD over Harting Ditch?

It is owned by the City or Municipal Highway Agency.