US Bridges

18th B RD over Tippecanoe River

Fair

Marshall County, Indiana · 00.20 E of S Dewberry · Structure no. 5000103

Built
1970
55 years old
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
167 ft
3 main spans
Daily traffic
350
2024 count
Owner
County
County Highway Agency

About this bridge

18th B RD over Tippecanoe River is a prestressed concrete box beam or girders - multiple carrying 18th B RD over Tippecanoe River in Marshall County, Indiana. It was built in 1970, so it is 55 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 350 vehicles a day, roughly 5% of them trucks, projected to reach 500 by 2042. The structure is 167 ft (50.8 m) long and 26 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
Carries18th B RD
CrossesTippecanoe River
Location00.20 E of S Dewberry
RouteCounty Highway 16
CountyMarshall County
StateIndiana
Coordinates41.20877, -86.12575
Functional classRural Minor 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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 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 rating78.4 US tons
Inventory rating47 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length167 ft (50.8 m)
Longest span55 ft (16.7 m)
Deck width26 ft (8 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2024)
Projected traffic500 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 18th B RD over Tippecanoe River built?

It was built in 1970, making it 55 years old in 2025.

What condition is 18th B RD over Tippecanoe 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 October 2024.

How much traffic does 18th B RD over Tippecanoe River carry?

About 350 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is 18th B RD over Tippecanoe River?

The structure is 167 ft (50.8 m) long with a longest span of 55 ft (16.7 m) and a deck 26 ft wide.

Who owns 18th B RD over Tippecanoe River?

It is owned by the County Highway Agency.