US Bridges

Sma 3686;JOPLIN RD over High Line Canal

Fair

Canyon County, Idaho · 2.5 S. 2.6 E. Middleton · Structure no. 000000000027375

Built
1981
44 years old
Condition
Fair
inspected March 2024
Type
Frame
Concrete
Length
25 ft
1 main span
Daily traffic
350
2023 count
Owner
Local
Other Local Agency

About this bridge

Sma 3686;JOPLIN RD over High Line Canal is a concrete frame carrying Sma 3686;JOPLIN RD over High Line Canal in Canyon County, Idaho. It was built in 1981, so it is 44 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 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 350 vehicles a day, roughly 13% of them trucks, projected to reach 525 by 2042. The structure is 25 ft (7.6 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSma 3686;JOPLIN RD
CrossesHigh Line Canal
Location2.5 S. 2.6 E. Middleton
RouteCounty Highway 3686
CountyCanyon County
StateIdaho
Coordinates43.67044, -116.56714
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span25 ft (7.6 m)
Deck width36 ft (11 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2023)
Projected traffic525 by 2042
Trucks13%
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

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$419,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sma 3686;JOPLIN RD over High Line Canal built?

It was built in 1981, making it 44 years old in 2025.

What condition is Sma 3686;JOPLIN RD over High 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 Sma 3686;JOPLIN RD over High Line Canal carry?

About 350 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is Sma 3686;JOPLIN RD over High Line Canal?

The structure is 25 ft (7.6 m) long with a longest span of 25 ft (7.6 m) and a deck 36 ft wide.

Who owns Sma 3686;JOPLIN RD over High Line Canal?

It is owned by the Other Local Agency.