US Bridges

Thompson RD over Unnamed Ditch

Fair

Marion County, Indiana · 00.20 W of Mann RD · Structure no. 4900372

Built
1968
57 years old, rebuilt 1980
Condition
Fair
inspected July 2024
Type
Slab
Concrete
Length
34 ft
2 main spans
Daily traffic
4,458
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

Thompson RD over Unnamed Ditch is a concrete slab carrying Thompson RD over Unnamed Ditch in Marion County, Indiana. It was built in 1968 and reconstructed in 1980, so it is 57 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 4,458 vehicles a day, roughly 5% of them trucks, projected to reach 6,625 by 2039. The structure is 34 ft (10.4 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesThompson RD
CrossesUnnamed Ditch
Location00.20 W of Mann RD
RouteCity Street 0
CountyMarion County
StateIndiana
Coordinates39.69181, -86.24745
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
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.1 US tons
Inventory rating35.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length34 ft (10.4 m)
Longest span14 ft (4.4 m)
Deck width33 ft (10 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,458 (2019)
Projected traffic6,625 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

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 Unnamed Ditch built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1980.

What condition is Thompson RD over Unnamed 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 Unnamed Ditch carry?

About 4,458 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is Thompson RD over Unnamed Ditch?

The structure is 34 ft (10.4 m) long with a longest span of 14 ft (4.4 m) and a deck 33 ft wide.

Who owns Thompson RD over Unnamed Ditch?

It is owned by the City or Municipal Highway Agency.