US Bridges

SR 20 over Tacoma CR

Poor

Pend Oreille County, Washington · 24.9 E JCT SR 31 · Structure no. 0003073A0000000

Built
1946
79 years old
Condition
Poor
inspected April 2023
Type
Slab
Concrete Continuous
Length
104 ft
5 main spans
Daily traffic
1,202
2023 count
Owner
State
State Highway Agency

About this bridge

SR 20 over Tacoma CR is a concrete continuous slab carrying SR 20 over Tacoma CR in Pend Oreille County, Washington. It was built in 1946, so it is 79 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,202 vehicles a day, roughly 17% of them trucks, projected to reach 1,480 by 2039. The structure is 104 ft (31.7 m) long and 36 ft wide. If it were closed, the detour would be 70.2 mi (113 km).

Location

Open in Google Maps
CarriesSR 20
CrossesTacoma CR
Location24.9 E JCT SR 31
RouteState Highway 20
CountyPend Oreille County
StateWashington
Coordinates48.38972, -117.31342
Functional classRural Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating41 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length104 ft (31.7 m)
Longest span22 ft (6.7 m)
Deck width36 ft (11 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,202 (2023)
Projected traffic1,480 by 2039
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed70.2 mi (113 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$1.8 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 20 over Tacoma CR built?

It was built in 1946, making it 79 years old in 2025.

What condition is SR 20 over Tacoma CR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2023.

How much traffic does SR 20 over Tacoma CR carry?

About 1,202 vehicles per day (2023 count), of which roughly 17% are trucks.

How long is SR 20 over Tacoma CR?

The structure is 104 ft (31.7 m) long with a longest span of 22 ft (6.7 m) and a deck 36 ft wide.

Who owns SR 20 over Tacoma CR?

It is owned by the State Highway Agency.