US Bridges

Old Redmond Road over 138th Ave NE

Fair

King County, Washington · 1.0 MI E of I-405 · Structure no. 085692000000000

Built
1970
55 years old
Condition
Fair
inspected May 2023
Type
Channel Beam
Concrete
Length
36 ft
1 main span
Daily traffic
13,100
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

Old Redmond Road over 138th Ave NE is a concrete channel beam carrying Old Redmond Road over 138th Ave NE in King County, Washington. It was built in 1970, so it is 55 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 13,100 vehicles a day, roughly 4% of them trucks, projected to reach 16,100 by 2043. The structure is 36 ft (11 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesOld Redmond Road
Crosses138th Ave NE
Location1.0 MI E of I-405
RouteCity Street 1065
CountyKing County
StateWashington
Coordinates47.66714, -122.157
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44 US tons
Inventory rating26.5 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckOther
Main spans1
Design loadHS 20
Structure length36 ft (11 m)
Longest span34 ft (10.4 m)
Deck width56 ft (17.2 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,100 (2019)
Projected traffic16,100 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.7 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Old Redmond Road over 138th Ave NE built?

It was built in 1970, making it 55 years old in 2025.

What condition is Old Redmond Road over 138th Ave NE 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 Old Redmond Road over 138th Ave NE carry?

About 13,100 vehicles per day (2019 count), of which roughly 4% are trucks.

How long is Old Redmond Road over 138th Ave NE?

The structure is 36 ft (11 m) long with a longest span of 34 ft (10.4 m) and a deck 56 ft wide.

Who owns Old Redmond Road over 138th Ave NE?

It is owned by the City or Municipal Highway Agency.