US Bridges

CR 1850S over Chapman Ditch

Fair

LaPorte County, Indiana · 0.20 East US 421 · Structure no. 4600147

Built
1985
40 years old
Condition
Fair
inspected September 2024
Type
Culvert
Steel
Length
25 ft
2 main spans
Daily traffic
200
2024 count
Owner
County
County Highway Agency

About this bridge

CR 1850S over Chapman Ditch is a steel culvert carrying CR 1850S over Chapman Ditch in LaPorte County, Indiana. It was built in 1985, so it is 40 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 200 vehicles a day, roughly 5% of them trucks, projected to reach 300 by 2044. The structure is 25 ft (7.7 m) long and 44 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesCR 1850S
CrossesChapman Ditch
Location0.20 East US 421
RouteCounty Highway 124
CountyLaPorte County
StateIndiana
Coordinates41.33909, -86.8891
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.6 US tons
Inventory rating81 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20
Structure length25 ft (7.7 m)
Longest span10 ft (3.2 m)
Deck width44 ft (13.4 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2024)
Projected traffic300 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 1850S over Chapman Ditch built?

It was built in 1985, making it 40 years old in 2025.

What condition is CR 1850S over Chapman 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 1850S over Chapman Ditch carry?

About 200 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is CR 1850S over Chapman Ditch?

The structure is 25 ft (7.7 m) long with a longest span of 10 ft (3.2 m) and a deck 44 ft wide.

Who owns CR 1850S over Chapman Ditch?

It is owned by the County Highway Agency.