US Bridges

SR 18 over North Troy RD (cr 200 W)

Fair

Grant County, Indiana · 02.14 W SR 9 · Structure no. 004820

Built
1956
69 years old, rebuilt 2003
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
127 ft
3 main spans
Daily traffic
5,971
2018 count
Owner
State
State Highway Agency

About this bridge

SR 18 over North Troy RD (cr 200 W) is a steel continuous stringer/multi-beam or girder carrying SR 18 over North Troy RD (cr 200 W) in Grant County, Indiana. It was built in 1956 and reconstructed in 2003, so it is 69 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 5,971 vehicles a day, roughly 15% of them trucks, projected to reach 11,570 by 2032. The structure is 127 ft (38.7 m) long and 35 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesSR 18
CrossesNorth Troy RD (cr 200 W)
Location02.14 W SR 9
RouteState Highway 18
StateIndiana
Coordinates40.56313, -85.71238
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating92.8 US tons
Inventory rating71.4 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length127 ft (38.7 m)
Longest span48 ft (14.6 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,971 (2018)
Projected traffic11,570 by 2032
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 18 over North Troy RD (cr 200 W) built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 2003.

What condition is SR 18 over North Troy RD (cr 200 W) 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 August 2023.

How much traffic does SR 18 over North Troy RD (cr 200 W) carry?

About 5,971 vehicles per day (2018 count), of which roughly 15% are trucks.

How long is SR 18 over North Troy RD (cr 200 W)?

The structure is 127 ft (38.7 m) long with a longest span of 48 ft (14.6 m) and a deck 35 ft wide.

Who owns SR 18 over North Troy RD (cr 200 W)?

It is owned by the State Highway Agency.