US Bridges

South River Road over Palouse River

Good

Latah County, Idaho · 4.7 N. 0.8 E. V Iola · Structure no. 000000000029526

Built
2000
25 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
85 ft
1 main span
Daily traffic
50
2023 count
Owner
Local
Other Local Agency

About this bridge

South River Road over Palouse River is a prestressed concrete stringer/multi-beam or girder carrying South River Road over Palouse River in Latah County, Idaho. It was built in 2000, so it is 25 years old, younger than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 50 vehicles a day, roughly 5% of them trucks, projected to reach 75 by 2039. The structure is 85 ft (25.9 m) long and 29 ft wide. If it were closed, the detour would be 9.3 mi (15 km).

CarriesSouth River Road
CrossesPalouse River
Location4.7 N. 0.8 E. V Iola
RouteCounty Highway 0
StateIdaho
Coordinates46.90622, -117.00753
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length85 ft (25.9 m)
Longest span83 ft (25.3 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic75 by 2039
Trucks5%
Lanes on structure2
Traffic directionHighway traffic not carried
CarriesHighway
CrossesWaterway
Detour if closed9.3 mi (15 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local 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 South River Road over Palouse River built?

It was built in 2000, making it 25 years old in 2025.

What condition is South River Road over Palouse River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2024.

How much traffic does South River Road over Palouse River carry?

About 50 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is South River Road over Palouse River?

The structure is 85 ft (25.9 m) long with a longest span of 83 ft (25.3 m) and a deck 29 ft wide.

Who owns South River Road over Palouse River?

It is owned by the Other Local Agency.