US Bridges

South River Road over I 90;S River RD Gs

Fair

Kootenai County, Idaho · 14.0 W. Kellogg · Structure no. 000000000030625

Built
1962
63 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
255 ft
4 main spans
Daily traffic
270
2023 count
Owner
State
State Highway Agency

About this bridge

South River Road over I 90;S River RD Gs is a prestressed concrete stringer/multi-beam or girder carrying South River Road over I 90;S River RD Gs in Kootenai County, Idaho. It was built in 1962, so it is 63 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 270 vehicles a day, roughly 10% of them trucks, projected to reach 405 by 2042. The structure is 255 ft (77.7 m) long and 29 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesSouth River Road
CrossesI 90;S River RD Gs
Location14.0 W. Kellogg
RouteCounty Highway 0
CountyKootenai County
StateIdaho
Coordinates47.56577, -116.40859
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating56 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 length255 ft (77.7 m)
Longest span70 ft (21.3 m)
Deck width29 ft (8.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic270 (2023)
Projected traffic405 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 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$3.2 million (2017 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was South River Road over I 90;S River RD Gs built?

It was built in 1962, making it 63 years old in 2025.

What condition is South River Road over I 90;S River RD Gs 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 May 2023.

How much traffic does South River Road over I 90;S River RD Gs carry?

About 270 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is South River Road over I 90;S River RD Gs?

The structure is 255 ft (77.7 m) long with a longest span of 70 ft (21.3 m) and a deck 29 ft wide.

Who owns South River Road over I 90;S River RD Gs?

It is owned by the State Highway Agency.