US Bridges

I-70 WB over Knight Road

Fair

Putnam County, Indiana · 04.69 W SR 243 · Structure no. 041520

Built
1966
59 years old, rebuilt 1984
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
114 ft
3 main spans
Daily traffic
34,117
2021 count
Owner
State
State Highway Agency

About this bridge

I-70 WB over Knight Road is a concrete continuous slab carrying I-70 WB over Knight Road in Putnam County, Indiana. It was built in 1966 and reconstructed in 1984, so it is 59 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 34,117 vehicles a day, roughly 51% of them trucks, projected to reach 27,779 by 2030. The structure is 114 ft (34.7 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI-70 WB
CrossesKnight Road
Location04.69 W SR 243
RouteInterstate 70
CountyPutnam County
StateIndiana
Coordinates39.50253, -86.9586
Functional classRural Principal Arterial - Interstate

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.5 US tons
Inventory rating36.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length114 ft (34.7 m)
Longest span46 ft (13.9 m)
Deck width42 ft (12.7 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,117 (2021)
Projected traffic27,779 by 2030
Trucks51%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I-70 WB over Knight Road built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1984.

What condition is I-70 WB over Knight Road 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 March 2023.

How much traffic does I-70 WB over Knight Road carry?

About 34,117 vehicles per day (2021 count), of which roughly 51% are trucks.

How long is I-70 WB over Knight Road?

The structure is 114 ft (34.7 m) long with a longest span of 46 ft (13.9 m) and a deck 42 ft wide.

Who owns I-70 WB over Knight Road?

It is owned by the State Highway Agency.