US Bridges

SW 3 1/2 Ave over A Line Canal

FairPosted for load

Payette County, Idaho · 2.2 S 3.5 W New Plymouth · Structure no. 000000000028403

Built
2003
22 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
54 ft
1 main span
Daily traffic
100
2023 count
Owner
Local
Other Local Agency

About this bridge

SW 3 1/2 Ave over A Line Canal is a steel stringer/multi-beam or girder carrying SW 3 1/2 Ave over A Line Canal in Payette County, Idaho. It was built in 2003, so it is 22 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 100 vehicles a day, roughly 10% of them trucks, projected to reach 150 by 2040. The structure is 54 ft (16.5 m) long and 31 ft wide.

Location

Open in Google Maps
CarriesSW 3 1/2 Ave
CrossesA Line Canal
Location2.2 S 3.5 W New Plymouth
RouteCounty Highway 0
CountyPayette County
StateIdaho
Coordinates43.94404, -116.88996
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30 US tons
Inventory rating18 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length54 ft (16.5 m)
Longest span38 ft (11.6 m)
Deck width31 ft (9.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2023)
Projected traffic150 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$399,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SW 3 1/2 Ave over A Line Canal built?

It was built in 2003, making it 22 years old in 2025.

What condition is SW 3 1/2 Ave over A Line 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 March 2024.

How much traffic does SW 3 1/2 Ave over A Line Canal carry?

About 100 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is SW 3 1/2 Ave over A Line Canal?

The structure is 54 ft (16.5 m) long with a longest span of 38 ft (11.6 m) and a deck 31 ft wide.

Who owns SW 3 1/2 Ave over A Line Canal?

It is owned by the Other Local Agency.