US Bridges

CR 100N over Antrim Ditch

Fair

Pulaski County, Indiana · 00.19 W of CR 1350 W · Structure no. 6600024

Built
1971
54 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete Continuous
Length
82 ft
3 main spans
Daily traffic
240
2022 count
Owner
County
County Highway Agency

About this bridge

CR 100N over Antrim Ditch is a concrete continuous slab carrying CR 100N over Antrim Ditch in Pulaski County, Indiana. It was built in 1971, so it is 54 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 240 vehicles a day, roughly 5% of them trucks, projected to reach 290 by 2042. The structure is 82 ft (24.9 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCR 100N
CrossesAntrim Ditch
Location00.19 W of CR 1350 W
RouteCounty Highway 64
CountyPulaski County
StateIndiana
Coordinates41.07053, -86.86673
Functional classRural Local

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.7 US tons
Inventory rating31.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length82 ft (24.9 m)
Longest span31 ft (9.4 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic240 (2022)
Projected traffic290 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 CR 100N over Antrim Ditch built?

It was built in 1971, making it 54 years old in 2025.

What condition is CR 100N over Antrim Ditch 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 September 2024.

How much traffic does CR 100N over Antrim Ditch carry?

About 240 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is CR 100N over Antrim Ditch?

The structure is 82 ft (24.9 m) long with a longest span of 31 ft (9.4 m) and a deck 30 ft wide.

Who owns CR 100N over Antrim Ditch?

It is owned by the County Highway Agency.