US Bridges

SR 18 EB over Mississinewa River

Fair

Grant County, Indiana · 01.53 E SR 9 · Structure no. 004845

Built
1983
42 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
382 ft
3 main spans
Daily traffic
4,641
2020 count
Owner
State
State Highway Agency

About this bridge

SR 18 EB over Mississinewa River is a steel continuous stringer/multi-beam or girder carrying SR 18 EB over Mississinewa River in Grant County, Indiana. It was built in 1983, so it is 42 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 4,641 vehicles a day, roughly 10% of them trucks, projected to reach 5,831 by 2034. The structure is 382 ft (116.4 m) long and 46 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesSR 18 EB
CrossesMississinewa River
Location01.53 E SR 9
RouteState Highway 18
CountyGrant County
StateIndiana
Coordinates40.55676, -85.64712
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.5 US tons
Inventory rating35.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+1 approach)
Design loadHS 20
Structure length382 ft (116.4 m)
Longest span142 ft (43.2 m)
Deck width46 ft (14.1 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,641 (2020)
Projected traffic5,831 by 2034
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 18 EB over Mississinewa River built?

It was built in 1983, making it 42 years old in 2025.

What condition is SR 18 EB over Mississinewa River 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 July 2023.

How much traffic does SR 18 EB over Mississinewa River carry?

About 4,641 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is SR 18 EB over Mississinewa River?

The structure is 382 ft (116.4 m) long with a longest span of 142 ft (43.2 m) and a deck 46 ft wide.

Who owns SR 18 EB over Mississinewa River?

It is owned by the State Highway Agency.