US Bridges

US 20B over Burgess Canal

Fair

Jefferson County, Idaho · 0.7 S. Rigby · Structure no. 000000000012715

Built
1972
53 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
63 ft
1 main span
Daily traffic
3,000
2023 count
Owner
State
State Highway Agency

About this bridge

US 20B over Burgess Canal is a prestressed concrete stringer/multi-beam or girder carrying US 20B over Burgess Canal in Jefferson County, Idaho. It was built in 1972, so it is 53 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 3,000 vehicles a day, projected to reach 4,500 by 2042. The structure is 63 ft (19.2 m) long and 92 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 20B
CrossesBurgess Canal
Location0.7 S. Rigby
RouteU.S. Route 20
CountyJefferson County
StateIdaho
Coordinates43.66356, -111.91794
Functional classRural Principal Arterial - Other

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length63 ft (19.2 m)
Longest span61 ft (18.6 m)
Deck width92 ft (28 m)
Roadway width89 ft (27 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (2023)
Projected traffic4,500 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway 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 US 20B over Burgess Canal built?

It was built in 1972, making it 53 years old in 2025.

What condition is US 20B over Burgess 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 April 2024.

How much traffic does US 20B over Burgess Canal carry?

About 3,000 vehicles per day (2023 count).

How long is US 20B over Burgess Canal?

The structure is 63 ft (19.2 m) long with a longest span of 61 ft (18.6 m) and a deck 92 ft wide.

Who owns US 20B over Burgess Canal?

It is owned by the State Highway Agency.