US Bridges

Road over Sulphur CR

Fair

Whatcom County, Washington · No Data Entered · Structure no. 060501000001518

Built
1954
71 years old
Condition
Fair
inspected July 2024
Type
Frame
Concrete Continuous
Length
52 ft
3 main spans
Daily traffic
81
1994 count
Owner
Federal
U.S. Forest Service

About this bridge

Road over Sulphur CR is a concrete continuous frame carrying Road over Sulphur CR in Whatcom County, Washington. It was built in 1954, so it is 71 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 6 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 81 vehicles a day, projected to reach 121 by 2045. The structure is 52 ft (15.8 m) long and 16 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

Location

Open in Google Maps
CarriesRoad
CrossesSulphur CR
LocationNo Data Entered
RouteFederal Lands Road 12000
CountyWhatcom County
StateWashington
Coordinates48.67227, -121.73487
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating44.1 US tons
Inventory rating27 US tons

Structure

Structure typeFrame
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadOther
Structure length52 ft (15.8 m)
Longest span30 ft (9.1 m)
Deck width16 ft (5 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic81 (1994)
Projected traffic121 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Road over Sulphur CR built?

It was built in 1954, making it 71 years old in 2025.

What condition is Road over Sulphur 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 July 2024.

How much traffic does Road over Sulphur CR carry?

About 81 vehicles per day (1994 count).

How long is Road over Sulphur CR?

The structure is 52 ft (15.8 m) long with a longest span of 30 ft (9.1 m) and a deck 16 ft wide.

Who owns Road over Sulphur CR?

It is owned by the U.S. Forest Service.