US Bridges

SH 33 over Henrys Fk.Snake River

Fair

Madison County, Idaho · 4.5 W. Rexburg · Structure no. 000000000016645

Built
1977
48 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
323 ft
4 main spans
Daily traffic
3,000
2023 count
Owner
State
State Highway Agency

About this bridge

SH 33 over Henrys Fk.Snake River is a prestressed concrete stringer/multi-beam or girder carrying SH 33 over Henrys Fk.Snake River in Madison County, Idaho. It was built in 1977, so it is 48 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, roughly 11% of them trucks, projected to reach 4,500 by 2042. The structure is 323 ft (98.5 m) long and 46 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesSH 33
CrossesHenrys Fk.Snake River
Location4.5 W. Rexburg
RouteState Highway 33
CountyMadison County
StateIdaho
Coordinates43.82628, -111.90483
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
Deck7 GoodSome minor problems.
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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating33 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length323 ft (98.5 m)
Longest span79 ft (24.1 m)
Deck width46 ft (13.9 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (2023)
Projected traffic4,500 by 2042
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemNo

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 SH 33 over Henrys Fk.Snake River built?

It was built in 1977, making it 48 years old in 2025.

What condition is SH 33 over Henrys Fk.Snake River 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 September 2023.

How much traffic does SH 33 over Henrys Fk.Snake River carry?

About 3,000 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is SH 33 over Henrys Fk.Snake River?

The structure is 323 ft (98.5 m) long with a longest span of 79 ft (24.1 m) and a deck 46 ft wide.

Who owns SH 33 over Henrys Fk.Snake River?

It is owned by the State Highway Agency.