US Bridges

SR 548 over California CR

Fair

Whatcom County, Washington · 10.3 W JCT I-5 · Structure no. 082365000000000

Built
1924
101 years old, rebuilt 1956
Condition
Fair
inspected May 2023
Type
Slab
Concrete
Length
104 ft
5 main spans
Daily traffic
3,810
2023 count
Owner
State
State Highway Agency

About this bridge

SR 548 over California CR is a concrete slab carrying SR 548 over California CR in Whatcom County, Washington. It was built in 1924 and reconstructed in 1956, so it is 101 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 3,810 vehicles a day, roughly 4% of them trucks, projected to reach 5,367 by 2039. The structure is 104 ft (31.7 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSR 548
CrossesCalifornia CR
Location10.3 W JCT I-5
RouteState Highway 548
CountyWhatcom County
StateWashington
Coordinates48.95453, -122.72603
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
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 inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating38.6 US tons
Inventory rating30 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 15
Structure length104 ft (31.7 m)
Longest span22 ft (6.7 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,810 (2023)
Projected traffic5,367 by 2039
Trucks4%
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

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$1.6 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 548 over California CR built?

It was built in 1924, making it 101 years old in 2025. It was reconstructed in 1956.

What condition is SR 548 over California 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 May 2023.

How much traffic does SR 548 over California CR carry?

About 3,810 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is SR 548 over California CR?

The structure is 104 ft (31.7 m) long with a longest span of 22 ft (6.7 m) and a deck 27 ft wide.

Who owns SR 548 over California CR?

It is owned by the State Highway Agency.