US Bridges

CR 300S over Ahlgrim Ditch

Good

Porter County, Indiana · 0.2 Miles E of S.R. 49 · Structure no. 6400170

Built
2016
9 years old
Condition
Good
inspected May 2024
Type
Culvert
Aluminum, Wrought Iron, or Cast Iron
Length
26 ft
1 main span
Daily traffic
970
2018 count
Owner
County
County Highway Agency

About this bridge

CR 300S over Ahlgrim Ditch is a aluminum, wrought iron, or cast iron culvert carrying CR 300S over Ahlgrim Ditch in Porter County, Indiana. It was built in 2016, so it is 9 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 970 vehicles a day, roughly 6% of them trucks, projected to reach 1,830 by 2038. The structure is 26 ft (8 m) long and 29 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesCR 300S
CrossesAhlgrim Ditch
Location0.2 Miles E of S.R. 49
RouteCounty Highway 30
CountyPorter County
StateIndiana
Coordinates41.39079, -87.02105
Functional classRural Minor Collector

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; 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.1 US tons
Inventory rating32.2 US tons

Structure

Structure typeCulvert
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans1
Design loadHL 93
Structure length26 ft (8 m)
Longest span26 ft (7.8 m)
Deck width29 ft (8.8 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic970 (2018)
Projected traffic1,830 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 300S over Ahlgrim Ditch built?

It was built in 2016, making it 9 years old in 2025.

What condition is CR 300S 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 300S over Ahlgrim Ditch carry?

About 970 vehicles per day (2018 count), of which roughly 6% are trucks.

How long is CR 300S over Ahlgrim Ditch?

The structure is 26 ft (8 m) long with a longest span of 26 ft (7.8 m) and a deck 29 ft wide.

Who owns CR 300S over Ahlgrim Ditch?

It is owned by the County Highway Agency.