US Bridges

CR 450S over Cobb Ditch

Fair

Porter County, Indiana · 00.40 W Smoke Road · Structure no. 6400060

Built
1970
55 years old, rebuilt 1996
Condition
Fair
inspected May 2024
Type
Channel Beam
Concrete
Length
40 ft
1 main span
Daily traffic
640
2018 count
Owner
County
County Highway Agency

About this bridge

CR 450S over Cobb Ditch is a concrete channel beam carrying CR 450S over Cobb Ditch in Porter County, Indiana. It was built in 1970 and reconstructed in 1996, so it is 55 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 640 vehicles a day, roughly 6% of them trucks, projected to reach 1,150 by 2038. The structure is 40 ft (12.1 m) long and 28 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesCR 450S
CrossesCobb Ditch
Location00.40 W Smoke Road
RouteCounty Highway 26
CountyPorter County
StateIndiana
Coordinates41.3694, -87.0738
Functional classRural Minor Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.6 US tons
Inventory rating35.9 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length40 ft (12.1 m)
Longest span36 ft (10.9 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic640 (2018)
Projected traffic1,150 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 450S over Cobb Ditch built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1996.

What condition is CR 450S over Cobb 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 May 2024.

How much traffic does CR 450S over Cobb Ditch carry?

About 640 vehicles per day (2018 count), of which roughly 6% are trucks.

How long is CR 450S over Cobb Ditch?

The structure is 40 ft (12.1 m) long with a longest span of 36 ft (10.9 m) and a deck 28 ft wide.

Who owns CR 450S over Cobb Ditch?

It is owned by the County Highway Agency.