US Bridges

S. Snake River RD over Lyons Creek

Fair

Madison County, Idaho · 10.0 S. 2.3 E. Rexburg · Structure no. 000000000032920

Built
1972
53 years old
Condition
Fair
inspected October 2024
Type
Tee Beam
Prestressed Concrete
Length
69 ft
1 main span
Daily traffic
80
2023 count
Owner
County
County Highway Agency

About this bridge

S. Snake River RD over Lyons Creek is a prestressed concrete tee beam carrying S. Snake River RD over Lyons Creek in Madison 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 80 vehicles a day, roughly 10% of them trucks, projected to reach 120 by 2039. The structure is 69 ft (21 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesS. Snake River RD
CrossesLyons Creek
Location10.0 S. 2.3 E. Rexburg
RouteCounty Highway 0
StateIdaho
Coordinates43.68156, -111.74406
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
Deck8 Very GoodNo problems noted.
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
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
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 typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length69 ft (21 m)
Longest span62 ft (18.9 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2023)
Projected traffic120 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

OwnerCounty Highway Agency
Maintained byCounty 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 S. Snake River RD over Lyons Creek built?

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

What condition is S. Snake River RD over Lyons Creek 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 S. Snake River RD over Lyons Creek carry?

About 80 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is S. Snake River RD over Lyons Creek?

The structure is 69 ft (21 m) long with a longest span of 62 ft (18.9 m) and a deck 30 ft wide.

Who owns S. Snake River RD over Lyons Creek?

It is owned by the County Highway Agency.