US Bridges

CR 350W over Ludington Ditch

Fair

Porter County, Indiana · 00.20 N 400 S · Structure no. 6400102

Built
1962
63 years old, rebuilt 1999
Condition
Fair
inspected May 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
29 ft
1 main span
Daily traffic
530
2018 count
Owner
County
County Highway Agency

About this bridge

CR 350W over Ludington Ditch is a prestressed concrete box beam or girders - multiple carrying CR 350W over Ludington Ditch in Porter County, Indiana. It was built in 1962 and reconstructed in 1999, so it is 63 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 530 vehicles a day, roughly 6% of them trucks, projected to reach 1,000 by 2038. The structure is 29 ft (8.8 m) long and 23 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCR 350W
CrossesLudington Ditch
Location00.20 N 400 S
RouteCounty Highway 135
CountyPorter County
StateIndiana
Coordinates41.3777, -87.1333
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 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 rating44 US tons
Inventory rating34 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length29 ft (8.8 m)
Longest span24 ft (7.2 m)
Deck width23 ft (7 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic530 (2018)
Projected traffic1,000 by 2038
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 350W over Ludington Ditch built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1999.

What condition is CR 350W over Ludington 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 350W over Ludington Ditch carry?

About 530 vehicles per day (2018 count), of which roughly 6% are trucks.

How long is CR 350W over Ludington Ditch?

The structure is 29 ft (8.8 m) long with a longest span of 24 ft (7.2 m) and a deck 23 ft wide.

Who owns CR 350W over Ludington Ditch?

It is owned by the County Highway Agency.