US Bridges

SR 71 over Finigan Ditch

Fair

Benton County, Indiana · 01.96 S SR 18 · Structure no. 024680

Built
1984
41 years old
Condition
Fair
inspected November 2023
Type
Slab
Concrete Continuous
Length
70 ft
3 main spans
Daily traffic
240
2021 count
Owner
State
State Highway Agency

About this bridge

SR 71 over Finigan Ditch is a concrete continuous slab carrying SR 71 over Finigan Ditch in Benton County, Indiana. It was built in 1984, so it is 41 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 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 240 vehicles a day, roughly 17% of them trucks, projected to reach 427 by 2034. The structure is 70 ft (21.3 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSR 71
CrossesFinigan Ditch
Location01.96 S SR 18
RouteState Highway 71
CountyBenton County
StateIndiana
Coordinates40.59413, -87.49068
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
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 protection7 GoodSome minor problems.
Last inspectionNovember 2023
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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.8 US tons
Inventory rating25.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length70 ft (21.3 m)
Longest span25 ft (7.7 m)
Deck width36 ft (11.1 m)
Roadway width34 ft (10.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic240 (2021)
Projected traffic427 by 2034
Trucks17%
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 71 over Finigan Ditch built?

It was built in 1984, making it 41 years old in 2025.

What condition is SR 71 over Finigan 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 November 2023.

How much traffic does SR 71 over Finigan Ditch carry?

About 240 vehicles per day (2021 count), of which roughly 17% are trucks.

How long is SR 71 over Finigan Ditch?

The structure is 70 ft (21.3 m) long with a longest span of 25 ft (7.7 m) and a deck 36 ft wide.

Who owns SR 71 over Finigan Ditch?

It is owned by the State Highway Agency.