US Bridges

SR 331 over Brock Ditch

Good

Marshall County, Indiana · 03.08 N US 30 · Structure no. 031438

Built
2006
19 years old
Condition
Good
inspected May 2023
Type
Slab
Concrete
Length
22 ft
1 main span
Daily traffic
3,744
2021 count
Owner
State
State Highway Agency

About this bridge

SR 331 over Brock Ditch is a concrete slab carrying SR 331 over Brock Ditch in Marshall County, Indiana. It was built in 2006, so it is 19 years old, younger than the Indiana average of 46.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,744 vehicles a day, roughly 16% of them trucks, projected to reach 6,417 by 2029. The structure is 22 ft (6.8 m) long and 48 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSR 331
CrossesBrock Ditch
Location03.08 N US 30
RouteState Highway 331
CountyMarshall County
StateIndiana
Coordinates41.3577, -86.11677
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.1 US tons
Inventory rating35.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length22 ft (6.8 m)
Longest span22 ft (6.8 m)
Deck width48 ft (14.6 m)
Roadway width36 ft (10.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,744 (2021)
Projected traffic6,417 by 2029
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 331 over Brock Ditch built?

It was built in 2006, making it 19 years old in 2025.

What condition is SR 331 over Brock Ditch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does SR 331 over Brock Ditch carry?

About 3,744 vehicles per day (2021 count), of which roughly 16% are trucks.

How long is SR 331 over Brock Ditch?

The structure is 22 ft (6.8 m) long with a longest span of 22 ft (6.8 m) and a deck 48 ft wide.

Who owns SR 331 over Brock Ditch?

It is owned by the State Highway Agency.