US Bridges

Little Spokane Dr. over Little Spokane River

Fair

Spokane County, Washington · 1.2 E Psh No 395 · Structure no. 084499000000000

Built
1961
64 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
97 ft
3 main spans
Daily traffic
2,456
2020 count
Owner
County
County Highway Agency

About this bridge

Little Spokane Dr. over Little Spokane River is a prestressed concrete stringer/multi-beam or girder carrying Little Spokane Dr. over Little Spokane River in Spokane County, Washington. It was built in 1961, so it is 64 years old, older than the Washington average of 49.8 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 2,456 vehicles a day, roughly 11% of them trucks, projected to reach 3,536 by 2042. The structure is 97 ft (29.5 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesLittle Spokane Dr.
CrossesLittle Spokane River
Location1.2 E Psh No 395
RouteCounty Highway 2570
CountySpokane County
StateWashington
Coordinates47.79828, -117.38248
Functional classUrban 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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating30.8 US tons
Inventory rating22.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length97 ft (29.5 m)
Longest span32 ft (9.7 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,456 (2020)
Projected traffic3,536 by 2042
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$1.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Little Spokane Dr. over Little Spokane River built?

It was built in 1961, making it 64 years old in 2025.

What condition is Little Spokane Dr. over Little Spokane 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 Little Spokane Dr. over Little Spokane River carry?

About 2,456 vehicles per day (2020 count), of which roughly 11% are trucks.

How long is Little Spokane Dr. over Little Spokane River?

The structure is 97 ft (29.5 m) long with a longest span of 32 ft (9.7 m) and a deck 30 ft wide.

Who owns Little Spokane Dr. over Little Spokane River?

It is owned by the County Highway Agency.