US Bridges

SR 18 over Greenwood Ditch

Fair

Benton County, Indiana · 06.84 E US 52 · Structure no. 004570

Built
1934
91 years old, rebuilt 1981
Condition
Fair
inspected January 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
54 ft
1 main span
Daily traffic
470
2021 count
Owner
State
State Highway Agency

About this bridge

SR 18 over Greenwood Ditch is a prestressed concrete box beam or girders - multiple carrying SR 18 over Greenwood Ditch in Benton County, Indiana. It was built in 1934 and reconstructed in 1981, so it is 91 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 470 vehicles a day, roughly 20% of them trucks, projected to reach 1,499 by 2030. The structure is 54 ft (16.4 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSR 18
CrossesGreenwood Ditch
Location06.84 E US 52
RouteState Highway 18
CountyBenton County
StateIndiana
Coordinates40.606, -87.17667
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating50.4 US tons
Inventory rating34.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length54 ft (16.4 m)
Longest span35 ft (10.6 m)
Deck width30 ft (9.2 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic470 (2021)
Projected traffic1,499 by 2030
Trucks20%
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 18 over Greenwood Ditch built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 1981.

What condition is SR 18 over Greenwood 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 January 2024.

How much traffic does SR 18 over Greenwood Ditch carry?

About 470 vehicles per day (2021 count), of which roughly 20% are trucks.

How long is SR 18 over Greenwood Ditch?

The structure is 54 ft (16.4 m) long with a longest span of 35 ft (10.6 m) and a deck 30 ft wide.

Who owns SR 18 over Greenwood Ditch?

It is owned by the State Highway Agency.