US Bridges

Road over Rocky CR

Fair

Whatcom County, Washington · No Data Entered · Structure no. 060501000001521

Built
1959
66 years old
Condition
Fair
inspected July 2024
Type
Channel Beam
Concrete Continuous
Length
68 ft
3 main spans
Daily traffic
30
1994 count
Owner
Federal
U.S. Forest Service

About this bridge

Road over Rocky CR is a concrete continuous channel beam carrying Road over Rocky CR in Whatcom County, Washington. It was built in 1959, so it is 66 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 30 vehicles a day, projected to reach 45 by 2045. The structure is 68 ft (20.7 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
CrossesRocky CR
LocationNo Data Entered
RouteFederal Lands Road 12000
CountyWhatcom County
StateWashington
Coordinates48.67737, -121.7795
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52 US tons
Inventory rating31 US tons

Structure

Structure typeChannel Beam
MaterialConcrete Continuous
DeckOther
Main spans3
Design loadOther
Structure length68 ft (20.7 m)
Longest span45 ft (13.7 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (1994)
Projected traffic45 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 Rocky CR built?

It was built in 1959, making it 66 years old in 2025.

What condition is Road over Rocky 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 Rocky CR carry?

About 30 vehicles per day (1994 count).

How long is Road over Rocky CR?

The structure is 68 ft (20.7 m) long with a longest span of 45 ft (13.7 m) and a deck 16 ft wide.

Who owns Road over Rocky CR?

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