US Bridges

Sumas Ave over Johnson CR

FairPosted for load

Whatcom County, Washington · 0.15 N Front ST · Structure no. 085603000000000

Built
1970
55 years old, rebuilt 1992
Condition
Fair
inspected November 2024
Type
Channel Beam
Concrete
Length
69 ft
3 main spans
Daily traffic
926
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Sumas Ave over Johnson CR is a concrete channel beam carrying Sumas Ave over Johnson CR in Whatcom County, Washington. It was built in 1970 and reconstructed in 1992, 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. Its operating status is: posted for load restriction.

It carries about 926 vehicles a day, roughly 5% of them trucks, projected to reach 1,200 by 2046. The structure is 69 ft (21 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSumas Ave
CrossesJohnson CR
Location0.15 N Front ST
RouteCity Street 1265
Coordinates48.99658, -122.26283
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating20.7 US tons
Inventory rating12.5 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckOther
Main spans3
Design loadHS 20
Structure length69 ft (21 m)
Longest span30 ft (9.1 m)
Deck width34 ft (10.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic926 (2024)
Projected traffic1,200 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
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$2.9 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sumas Ave over Johnson CR built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1992.

What condition is Sumas Ave over Johnson CR 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 November 2024.

How much traffic does Sumas Ave over Johnson CR carry?

About 926 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Sumas Ave over Johnson CR?

The structure is 69 ft (21 m) long with a longest span of 30 ft (9.1 m) and a deck 34 ft wide.

Who owns Sumas Ave over Johnson CR?

It is owned by the City or Municipal Highway Agency.