US Bridges

SR 39 over Thompson Ditch

Fair

Pulaski County, Indiana · 02.27 N SR 14 · Structure no. 013440

Built
1947
78 years old, rebuilt 1986
Condition
Fair
inspected December 2023
Type
Arch - Deck
Concrete
Length
105 ft
1 main span
Daily traffic
1,058
2020 count
Owner
State
State Highway Agency

About this bridge

SR 39 over Thompson Ditch is a concrete arch - deck carrying SR 39 over Thompson Ditch in Pulaski County, Indiana. It was built in 1947 and reconstructed in 1986, so it is 78 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 1,058 vehicles a day, roughly 28% of them trucks, projected to reach 1,855 by 2030. The structure is 105 ft (32 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesSR 39
CrossesThompson Ditch
Location02.27 N SR 14
RouteState Highway 39
CountyPulaski County
StateIndiana
Coordinates41.08944, -86.77605
Functional classRural Major 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
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.9 US tons
Inventory rating53.9 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length105 ft (32 m)
Longest span45 ft (13.7 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,058 (2020)
Projected traffic1,855 by 2030
Trucks28%
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

OwnerState Highway Agency
Maintained byState 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 SR 39 over Thompson Ditch built?

It was built in 1947, making it 78 years old in 2025. It was reconstructed in 1986.

What condition is SR 39 over Thompson 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 December 2023.

How much traffic does SR 39 over Thompson Ditch carry?

About 1,058 vehicles per day (2020 count), of which roughly 28% are trucks.

How long is SR 39 over Thompson Ditch?

The structure is 105 ft (32 m) long with a longest span of 45 ft (13.7 m) and a deck 31 ft wide.

Who owns SR 39 over Thompson Ditch?

It is owned by the State Highway Agency.