US Bridges

I-65 NB over Brown Ditch

Fair

Lake County, Indiana · 03.64 S SR 2 · Structure no. 038310

Built
1964
61 years old, rebuilt 1994
Condition
Fair
inspected July 2024
Type
Slab
Concrete Continuous
Length
92 ft
3 main spans
Daily traffic
21,697
2022 count
Owner
State
State Highway Agency

About this bridge

I-65 NB over Brown Ditch is a concrete continuous slab carrying I-65 NB over Brown Ditch in Lake County, Indiana. It was built in 1964 and reconstructed in 1994, so it is 61 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 21,697 vehicles a day, roughly 20% of them trucks, projected to reach 25,479 by 2030. The structure is 92 ft (28 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI-65 NB
CrossesBrown Ditch
Location03.64 S SR 2
RouteInterstate 65
StateIndiana
Coordinates41.23755, -87.29534
Functional classRural Principal Arterial - Interstate

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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.4 US tons
Inventory rating27.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length92 ft (28 m)
Longest span36 ft (10.9 m)
Deck width42 ft (12.9 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,697 (2022)
Projected traffic25,479 by 2030
Trucks20%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I-65 NB over Brown Ditch built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1994.

What condition is I-65 NB over Brown 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 July 2024.

How much traffic does I-65 NB over Brown Ditch carry?

About 21,697 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is I-65 NB over Brown Ditch?

The structure is 92 ft (28 m) long with a longest span of 36 ft (10.9 m) and a deck 42 ft wide.

Who owns I-65 NB over Brown Ditch?

It is owned by the State Highway Agency.