US Bridges

Oasis Road over D Line Canal

Fair

Payette County, Idaho · 11.5S 3.2E New Plymouth · Structure no. 000000000028430

Built
1975
50 years old
Condition
Fair
inspected October 2024
Type
Tee Beam
Prestressed Concrete
Length
38 ft
1 main span
Daily traffic
700
2023 count
Owner
County
County Highway Agency

About this bridge

Oasis Road over D Line Canal is a prestressed concrete tee beam carrying Oasis Road over D Line Canal in Payette County, Idaho. It was built in 1975, so it is 50 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 700 vehicles a day, roughly 11% of them trucks, projected to reach 1,050 by 2042. The structure is 38 ft (11.6 m) long and 24 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesOasis Road
CrossesD Line Canal
Location11.5S 3.2E New Plymouth
RouteCounty Highway 0
CountyPayette County
StateIdaho
Coordinates43.80719, -116.75608
Functional classRural Minor 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; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length38 ft (11.6 m)
Longest span35 ft (10.7 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic700 (2023)
Projected traffic1,050 by 2042
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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$506,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Oasis Road over D Line Canal built?

It was built in 1975, making it 50 years old in 2025.

What condition is Oasis Road over D 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 Oasis Road over D Line Canal carry?

About 700 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is Oasis Road over D Line Canal?

The structure is 38 ft (11.6 m) long with a longest span of 35 ft (10.7 m) and a deck 24 ft wide.

Who owns Oasis Road over D Line Canal?

It is owned by the County Highway Agency.