US Bridges

SR 39 over Marquardt Ditch

Fair

LaPorte County, Indiana · 02.11 S US 30 · Structure no. 013500

Built
1951
74 years old
Condition
Fair
inspected December 2023
Type
Culvert
Concrete
Length
23 ft
1 main span
Daily traffic
2,120
2004 count
Owner
State
State Highway Agency

About this bridge

SR 39 over Marquardt Ditch is a concrete culvert carrying SR 39 over Marquardt Ditch in LaPorte County, Indiana. It was built in 1951, so it is 74 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 6 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 2,120 vehicles a day, roughly 10% of them trucks, projected to reach 3,518 by 2029. The structure is 23 ft (7 m) long and 37 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSR 39
CrossesMarquardt Ditch
Location02.11 S US 30
RouteState Highway 39
CountyLaPorte County
StateIndiana
Coordinates41.37523, -86.73691
Functional classRural Major 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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating107.1 US tons
Inventory rating96.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 20
Structure length23 ft (7 m)
Longest span20 ft (6 m)
Deck width37 ft (11.3 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,120 (2004)
Projected traffic3,518 by 2029
Trucks10%
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

OwnerState Highway Agency
Maintained byState 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 SR 39 over Marquardt Ditch built?

It was built in 1951, making it 74 years old in 2025.

What condition is SR 39 over Marquardt 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 December 2023.

How much traffic does SR 39 over Marquardt Ditch carry?

About 2,120 vehicles per day (2004 count), of which roughly 10% are trucks.

How long is SR 39 over Marquardt Ditch?

The structure is 23 ft (7 m) long with a longest span of 20 ft (6 m) and a deck 37 ft wide.

Who owns SR 39 over Marquardt Ditch?

It is owned by the State Highway Agency.