US Bridges

SH 50 over Snake River;hansen Br.

Fair

Twin Falls County, Idaho · 8.3 E. Twin Falls · Structure no. 000000000014520

Built
1966
59 years old
Condition
Fair
inspected June 2022
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
762 ft
4 main spans
Daily traffic
9,200
2023 count
Owner
State
State Highway Agency

About this bridge

SH 50 over Snake River;hansen Br. is a steel continuous stringer/multi-beam or girder carrying SH 50 over Snake River;hansen Br. in Twin Falls County, Idaho. It was built in 1966, so it is 59 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 9,200 vehicles a day, roughly 30% of them trucks, projected to reach 13,800 by 2042. The structure is 762 ft (232.3 m) long and 34 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesSH 50
CrossesSnake River;hansen Br.
Location8.3 E. Twin Falls
RouteState Highway 50
CountyTwin Falls County
StateIdaho
Coordinates42.56576, -114.30034
Functional classRural Major Collector

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 inspectionJune 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.9 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length762 ft (232.3 m)
Longest span258 ft (78.6 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,200 (2023)
Projected traffic13,800 by 2042
Trucks30%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$11.4 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 50 over Snake River;hansen Br. built?

It was built in 1966, making it 59 years old in 2025.

What condition is SH 50 over Snake River;hansen Br. 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 June 2022.

How much traffic does SH 50 over Snake River;hansen Br. carry?

About 9,200 vehicles per day (2023 count), of which roughly 30% are trucks.

How long is SH 50 over Snake River;hansen Br.?

The structure is 762 ft (232.3 m) long with a longest span of 258 ft (78.6 m) and a deck 34 ft wide.

Who owns SH 50 over Snake River;hansen Br.?

It is owned by the State Highway Agency.