US Bridges

S 3200 E over Cub River;ne.Franklin Br

Fair

Franklin County, Idaho · 1.2 N. 0.3 E. Franklin · Structure no. 000000000023355

Built
1970
55 years old
Condition
Fair
inspected October 2024
Type
Culvert
Steel
Length
30 ft
2 main spans
Daily traffic
50
2023 count
Owner
County
County Highway Agency

About this bridge

S 3200 E over Cub River;ne.Franklin Br is a steel culvert carrying S 3200 E over Cub River;ne.Franklin Br in Franklin County, Idaho. It was built in 1970, so it is 55 years old, older than the Idaho average of 45.3 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 50 vehicles a day, roughly 10% of them trucks, projected to reach 75 by 2039. The structure is 30 ft (9.1 m) long and 39 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesS 3200 E
CrossesCub River;ne.Franklin Br
Location1.2 N. 0.3 E. Franklin
RouteCounty Highway 0
CountyFranklin County
StateIdaho
Coordinates42.03272, -111.79847
Functional classRural Local

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span14 ft (4.3 m)
Deck width39 ft (12 m)
Roadway width36 ft (11.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic75 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was S 3200 E over Cub River;ne.Franklin Br built?

It was built in 1970, making it 55 years old in 2025.

What condition is S 3200 E over Cub River;ne.Franklin Br 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 October 2024.

How much traffic does S 3200 E over Cub River;ne.Franklin Br carry?

About 50 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is S 3200 E over Cub River;ne.Franklin Br?

The structure is 30 ft (9.1 m) long with a longest span of 14 ft (4.3 m) and a deck 39 ft wide.

Who owns S 3200 E over Cub River;ne.Franklin Br?

It is owned by the County Highway Agency.