US Bridges

SH 25 over Snake River;downard Br

Fair

Minidoka County, Idaho · 5.2 E. Rupert · Structure no. 000000000013086

Built
1994
31 years old
Condition
Fair
inspected March 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
1,123 ft
13 main spans
Daily traffic
2,600
2023 count
Owner
State
State Highway Agency

About this bridge

SH 25 over Snake River;downard Br is a prestressed concrete continuous stringer/multi-beam or girder carrying SH 25 over Snake River;downard Br in Minidoka County, Idaho. It was built in 1994, so it is 31 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 2,600 vehicles a day, roughly 23% of them trucks, projected to reach 3,900 by 2042. The structure is 1,123 ft (342.3 m) long and 33 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesSH 25
CrossesSnake River;downard Br
Location5.2 E. Rupert
RouteState Highway 25
CountyMinidoka County
StateIdaho
Coordinates42.5825, -113.6275
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.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating88 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans13
Design loadHS 25 or greater
Structure length1,123 ft (342.3 m)
Longest span84 ft (25.6 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,600 (2023)
Projected traffic3,900 by 2042
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 25 over Snake River;downard Br built?

It was built in 1994, making it 31 years old in 2025.

What condition is SH 25 over Snake River;downard 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 March 2022.

How much traffic does SH 25 over Snake River;downard Br carry?

About 2,600 vehicles per day (2023 count), of which roughly 23% are trucks.

How long is SH 25 over Snake River;downard Br?

The structure is 1,123 ft (342.3 m) long with a longest span of 84 ft (25.6 m) and a deck 33 ft wide.

Who owns SH 25 over Snake River;downard Br?

It is owned by the State Highway Agency.