US Bridges

US 231 over Mill Creek

Fair

Owen County, Indiana · 01.07 S SR 67 · Structure no. 023890

Built
1932
93 years old, rebuilt 1975
Condition
Fair
inspected February 2023
Type
Culvert
Concrete
Length
82 ft
1 main span
Daily traffic
7,749
2022 count
Owner
State
State Highway Agency

About this bridge

US 231 over Mill Creek is a concrete culvert carrying US 231 over Mill Creek in Owen County, Indiana. It was built in 1932 and reconstructed in 1975, so it is 93 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 7,749 vehicles a day, roughly 10% of them trucks, projected to reach 12,529 by 2030. The structure is 82 ft (24.9 m) long and 48 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesUS 231
CrossesMill Creek
Location01.07 S SR 67
RouteU.S. Route 231
StateIndiana
Coordinates39.34065, -86.74497
Functional classRural Principal Arterial - Other

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating100 US tons
Inventory rating67.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 20
Structure length82 ft (24.9 m)
Longest span80 ft (24.3 m)
Deck width48 ft (14.5 m)
Roadway width45 ft (13.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,749 (2022)
Projected traffic12,529 by 2030
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkSTRAHNET connector

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 US 231 over Mill Creek built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 1975.

What condition is US 231 over Mill Creek 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 February 2023.

How much traffic does US 231 over Mill Creek carry?

About 7,749 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is US 231 over Mill Creek?

The structure is 82 ft (24.9 m) long with a longest span of 80 ft (24.3 m) and a deck 48 ft wide.

Who owns US 231 over Mill Creek?

It is owned by the State Highway Agency.