US Bridges

Roswell Road over Riverside Canal

Fair

Canyon County, Idaho · 3.1 S. 1.3 W. Parma · Structure no. 000000000027715

Built
1985
40 years old
Condition
Fair
inspected February 2024
Type
Tee Beam
Prestressed Concrete
Length
33 ft
1 main span
Daily traffic
300
2023 count
Owner
Local
Other Local Agency

About this bridge

Roswell Road over Riverside Canal is a prestressed concrete tee beam carrying Roswell Road over Riverside Canal in Canyon County, Idaho. It was built in 1985, so it is 40 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.

It carries about 300 vehicles a day, roughly 10% of them trucks, projected to reach 450 by 2039. The structure is 33 ft (10.1 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesRoswell Road
CrossesRiverside Canal
Location3.1 S. 1.3 W. Parma
RouteCounty Highway 0
CountyCanyon County
StateIdaho
Coordinates43.74278, -116.97214
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
Deck7 GoodSome minor problems.
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60.5 US tons
Inventory rating37.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span32 ft (9.8 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2023)
Projected traffic450 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Roswell Road over Riverside Canal built?

It was built in 1985, making it 40 years old in 2025.

What condition is Roswell Road over Riverside 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 Roswell Road over Riverside Canal carry?

About 300 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Roswell Road over Riverside Canal?

The structure is 33 ft (10.1 m) long with a longest span of 32 ft (9.8 m) and a deck 32 ft wide.

Who owns Roswell Road over Riverside Canal?

It is owned by the Other Local Agency.