US Bridges

Base RD over Cobbs Fork

Good

Decatur County, Indiana · 00.10 E of CR 500 E · Structure no. 1600193

Built
2004
21 years old
Condition
Good
inspected April 2023
Type
Culvert
Aluminum, Wrought Iron, or Cast Iron
Length
25 ft
1 main span
Daily traffic
280
2017 count
Owner
County
County Highway Agency

About this bridge

Base RD over Cobbs Fork is a aluminum, wrought iron, or cast iron culvert carrying Base RD over Cobbs Fork in Decatur County, Indiana. It was built in 2004, so it is 21 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 280 vehicles a day, roughly 3% of them trucks, projected to reach 440 by 2037. The structure is 25 ft (7.6 m) long and 18 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesBase RD
CrossesCobbs Fork
Location00.10 E of CR 500 E
RouteCounty Highway 0
StateIndiana
Coordinates39.33893, -85.3844
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.2 US tons
Inventory rating37.1 US tons

Structure

Structure typeCulvert
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans1
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span20 ft (6.1 m)
Deck width18 ft (5.4 m)
Roadway width18 ft (5.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic280 (2017)
Projected traffic440 by 2037
Trucks3%
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

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 Base RD over Cobbs Fork built?

It was built in 2004, making it 21 years old in 2025.

What condition is Base RD over Cobbs Fork 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 April 2023.

How much traffic does Base RD over Cobbs Fork carry?

About 280 vehicles per day (2017 count), of which roughly 3% are trucks.

How long is Base RD over Cobbs Fork?

The structure is 25 ft (7.6 m) long with a longest span of 20 ft (6.1 m) and a deck 18 ft wide.

Who owns Base RD over Cobbs Fork?

It is owned by the County Highway Agency.