US Bridges

US 20 over Inl Central Connector

Fair

Butte County, Idaho · 22.2 E. Arco · Structure no. 000000000013202

Built
1993
32 years old
Condition
Fair
inspected May 2022
Type
Frame
Concrete
Length
28 ft
1 main span
Daily traffic
4,400
2023 count
Owner
State
State Highway Agency

About this bridge

US 20 over Inl Central Connector is a concrete frame carrying US 20 over Inl Central Connector in Butte County, Idaho. It was built in 1993, so it is 32 years old, younger 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 4,400 vehicles a day, roughly 9% of them trucks, projected to reach 6,600 by 2042. The structure is 28 ft (8.5 m) long and 49 ft wide. If it were closed, the detour would be 57.8 mi (93 km).

Location

Open in Google Maps
CarriesUS 20
CrossesInl Central Connector
Location22.2 E. Arco
RouteU.S. Route 20
CountyButte County
StateIdaho
Coordinates43.50811, -112.91158
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.9 US tons
Inventory rating54 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length28 ft (8.5 m)
Longest span28 ft (8.5 m)
Deck width49 ft (14.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,400 (2023)
Projected traffic6,600 by 2042
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed57.8 mi (93 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 20 over Inl Central Connector built?

It was built in 1993, making it 32 years old in 2025.

What condition is US 20 over Inl Central Connector 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 May 2022.

How much traffic does US 20 over Inl Central Connector carry?

About 4,400 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is US 20 over Inl Central Connector?

The structure is 28 ft (8.5 m) long with a longest span of 28 ft (8.5 m) and a deck 49 ft wide.

Who owns US 20 over Inl Central Connector?

It is owned by the State Highway Agency.