US Bridges

CR 400S over Ahlgrim Ditch

Good

Porter County, Indiana · 00.30 E SR 49 · Structure no. 6400164

Built
2014
11 years old
Condition
Good
inspected May 2024
Type
Culvert
Aluminum, Wrought Iron, or Cast Iron
Length
28 ft
1 main span
Daily traffic
400
2018 count
Owner
County
County Highway Agency

About this bridge

CR 400S over Ahlgrim Ditch is a aluminum, wrought iron, or cast iron culvert carrying CR 400S over Ahlgrim Ditch in Porter County, Indiana. It was built in 2014, so it is 11 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 400 vehicles a day, roughly 6% of them trucks, projected to reach 760 by 2038. The structure is 28 ft (8.4 m) long and 30 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesCR 400S
CrossesAhlgrim Ditch
Location00.30 E SR 49
RouteCounty Highway 28
CountyPorter County
StateIndiana
Coordinates41.37631, -87.01986
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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.2 US tons
Inventory rating33.2 US tons

Structure

Structure typeCulvert
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans1
Design loadUnknown
Structure length28 ft (8.4 m)
Longest span27 ft (8.3 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2018)
Projected traffic760 by 2038
Trucks6%
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 CR 400S over Ahlgrim Ditch built?

It was built in 2014, making it 11 years old in 2025.

What condition is CR 400S over Ahlgrim 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 May 2024.

How much traffic does CR 400S over Ahlgrim Ditch carry?

About 400 vehicles per day (2018 count), of which roughly 6% are trucks.

How long is CR 400S over Ahlgrim Ditch?

The structure is 28 ft (8.4 m) long with a longest span of 27 ft (8.3 m) and a deck 30 ft wide.

Who owns CR 400S over Ahlgrim Ditch?

It is owned by the County Highway Agency.