US Bridges

Dunbar RD over Branch Big Walnut CR

Good

Putnam County, Indiana · 01.00 E CR 300 W · Structure no. 6700258

Built
2015
10 years old
Condition
Good
inspected March 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
64 ft
1 main span
Daily traffic
1,430
2023 count
Owner
County
County Highway Agency

About this bridge

Dunbar RD over Branch Big Walnut CR is a prestressed concrete box beam or girders - single or spread carrying Dunbar RD over Branch Big Walnut CR in Putnam County, Indiana. It was built in 2015, so it is 10 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 1,430 vehicles a day, roughly 1% of them trucks, projected to reach 1,960 by 2043. The structure is 64 ft (19.6 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesDunbar RD
CrossesBranch Big Walnut CR
Location01.00 E CR 300 W
RouteCounty Highway 0
CountyPutnam County
StateIndiana
Coordinates39.65949, -86.88464
Functional classRural Minor 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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable 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 rating45 US tons
Inventory rating35.9 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length64 ft (19.6 m)
Longest span62 ft (18.8 m)
Deck width31 ft (9.4 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,430 (2023)
Projected traffic1,960 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Dunbar RD over Branch Big Walnut CR built?

It was built in 2015, making it 10 years old in 2025.

What condition is Dunbar RD over Branch Big Walnut CR 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 March 2023.

How much traffic does Dunbar RD over Branch Big Walnut CR carry?

About 1,430 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Dunbar RD over Branch Big Walnut CR?

The structure is 64 ft (19.6 m) long with a longest span of 62 ft (18.8 m) and a deck 31 ft wide.

Who owns Dunbar RD over Branch Big Walnut CR?

It is owned by the County Highway Agency.