US Bridges

US 30 over Noble Canal

Fair

Payette County, Idaho · In New Plymouth;main St. · Structure no. 000000000013470

Built
1926
99 years old, rebuilt 1953
Condition
Fair
inspected February 2024
Type
Tee Beam
Concrete
Length
30 ft
1 main span
Daily traffic
4,100
2023 count
Owner
State
State Highway Agency

About this bridge

US 30 over Noble Canal is a concrete tee beam carrying US 30 over Noble Canal in Payette County, Idaho. It was built in 1926 and reconstructed in 1953, so it is 99 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 5 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 4,100 vehicles a day, roughly 5% of them trucks, projected to reach 6,150 by 2042. The structure is 30 ft (9.1 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 30
CrossesNoble Canal
LocationIn New Plymouth;main St.
RouteU.S. Route 30
CountyPayette County
StateIdaho
Coordinates43.97438, -116.82022
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length30 ft (9.1 m)
Longest span28 ft (8.5 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (10.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,100 (2023)
Projected traffic6,150 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$719,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 30 over Noble Canal built?

It was built in 1926, making it 99 years old in 2025. It was reconstructed in 1953.

What condition is US 30 over Noble Canal 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 February 2024.

How much traffic does US 30 over Noble Canal carry?

About 4,100 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is US 30 over Noble Canal?

The structure is 30 ft (9.1 m) long with a longest span of 28 ft (8.5 m) and a deck 39 ft wide.

Who owns US 30 over Noble Canal?

It is owned by the State Highway Agency.