US Bridges

SR 20 over Davis Creek

Fair

Pend Oreille County, Washington · 2.3 E JCT SR 211 · Structure no. 0002102C0000000

Built
1936
89 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
77 ft
5 main spans
Daily traffic
1,588
2023 count
Owner
State
State Highway Agency

About this bridge

SR 20 over Davis Creek is a wood or timber stringer/multi-beam or girder carrying SR 20 over Davis Creek in Pend Oreille County, Washington. It was built in 1936, so it is 89 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 5 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 1,588 vehicles a day, roughly 15% of them trucks, projected to reach 1,956 by 2039. The structure is 77 ft (23.5 m) long and 29 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesSR 20
CrossesDavis Creek
Location2.3 E JCT SR 211
RouteState Highway 20
CountyPend Oreille County
StateWashington
Coordinates48.27508, -117.26375
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating38 US tons
Inventory rating26 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans5
Design loadH 15
Structure length77 ft (23.5 m)
Longest span15 ft (4.6 m)
Deck width29 ft (8.8 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,588 (2023)
Projected traffic1,956 by 2039
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 20 over Davis Creek built?

It was built in 1936, making it 89 years old in 2025.

What condition is SR 20 over Davis Creek 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 SR 20 over Davis Creek carry?

About 1,588 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is SR 20 over Davis Creek?

The structure is 77 ft (23.5 m) long with a longest span of 15 ft (4.6 m) and a deck 29 ft wide.

Who owns SR 20 over Davis Creek?

It is owned by the State Highway Agency.