US Bridges

SR 18 over Greenwood Ditch

Fair

Benton County, Indiana · 05.69 E US 52 · Structure no. 004560

Built
1988
37 years old
Condition
Fair
inspected January 2024
Type
Culvert
Steel
Length
46 ft
2 main spans
Daily traffic
458
2021 count
Owner
State
State Highway Agency

About this bridge

SR 18 over Greenwood Ditch is a steel culvert carrying SR 18 over Greenwood Ditch in Benton County, Indiana. It was built in 1988, so it is 37 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 458 vehicles a day, roughly 20% of them trucks, projected to reach 1,499 by 2032. The structure is 46 ft (14 m) long and 44 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSR 18
CrossesGreenwood Ditch
Location05.69 E US 52
RouteState Highway 18
CountyBenton County
StateIndiana
Coordinates40.60602, -87.19867
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 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 geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20
Structure length46 ft (14 m)
Longest span20 ft (6 m)
Deck width44 ft (13.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic458 (2021)
Projected traffic1,499 by 2032
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 1988, making it 37 years old in 2025.

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

How long is SR 18 over Greenwood Ditch?

The structure is 46 ft (14 m) long with a longest span of 20 ft (6 m) and a deck 44 ft wide.

Who owns SR 18 over Greenwood Ditch?

It is owned by the State Highway Agency.