US Bridges

STC3857;SND Hollow over A Line Canal

Fair

Payette County, Idaho · 5.6S 2.2E New Plymouth · Structure no. 000000000028505

Built
1965
60 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
29 ft
1 main span
Daily traffic
1,300
2023 count
Owner
County
County Highway Agency

About this bridge

STC3857;SND Hollow over A Line Canal is a concrete stringer/multi-beam or girder carrying STC3857;SND Hollow over A Line Canal in Payette County, Idaho. It was built in 1965, so it is 60 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 1,300 vehicles a day, roughly 6% of them trucks, projected to reach 1,950 by 2042. The structure is 29 ft (8.8 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSTC3857;SND Hollow
CrossesA Line Canal
Location5.6S 2.2E New Plymouth
RouteCounty Highway 3857
CountyPayette County
StateIdaho
Coordinates43.89327, -116.77561
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length29 ft (8.8 m)
Longest span28 ft (8.5 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,300 (2023)
Projected traffic1,950 by 2042
Trucks6%
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 statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$429,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was STC3857;SND Hollow over A Line Canal built?

It was built in 1965, making it 60 years old in 2025.

What condition is STC3857;SND Hollow 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 October 2024.

How much traffic does STC3857;SND Hollow over A Line Canal carry?

About 1,300 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is STC3857;SND Hollow over A Line Canal?

The structure is 29 ft (8.8 m) long with a longest span of 28 ft (8.5 m) and a deck 30 ft wide.

Who owns STC3857;SND Hollow over A Line Canal?

It is owned by the County Highway Agency.