US Bridges

Bridge Road over Plass Ditch

Good

Knox County, Indiana · 00.40 N of Old Decker Roa · Structure no. 4200045

Built
1992
33 years old
Condition
Good
inspected September 2023
Type
Slab
Concrete Continuous
Length
121 ft
3 main spans
Daily traffic
130
2015 count
Owner
County
County Highway Agency

About this bridge

Bridge Road over Plass Ditch is a concrete continuous slab carrying Bridge Road over Plass Ditch in Knox County, Indiana. It was built in 1992, so it is 33 years old, younger than the Indiana average of 46.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 130 vehicles a day, roughly 3% of them trucks, projected to reach 170 by 2035. The structure is 121 ft (36.8 m) long and 29 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

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CarriesBridge Road
CrossesPlass Ditch
Location00.40 N of Old Decker Roa
RouteCounty Highway 0
CountyKnox County
StateIndiana
Coordinates38.58737, -87.51718
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45 US tons
Inventory rating35.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length121 ft (36.8 m)
Longest span47 ft (14.4 m)
Deck width29 ft (8.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic130 (2015)
Projected traffic170 by 2035
Trucks3%
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 Bridge Road over Plass Ditch built?

It was built in 1992, making it 33 years old in 2025.

What condition is Bridge Road over Plass Ditch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does Bridge Road over Plass Ditch carry?

About 130 vehicles per day (2015 count), of which roughly 3% are trucks.

How long is Bridge Road over Plass Ditch?

The structure is 121 ft (36.8 m) long with a longest span of 47 ft (14.4 m) and a deck 29 ft wide.

Who owns Bridge Road over Plass Ditch?

It is owned by the County Highway Agency.