US Bridges

Road over Swamp Creek

Good

Whatcom County, Washington · No Data Entered · Structure no. 060501000001426

Built
1984
41 years old
Condition
Good
inspected September 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
80
1996 count
Owner
Federal
U.S. Forest Service

About this bridge

Road over Swamp Creek is a prestressed concrete stringer/multi-beam or girder carrying Road over Swamp Creek in Whatcom County, Washington. It was built in 1984, so it is 41 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 80 vehicles a day, projected to reach 120 by 2045. The structure is 60 ft (18.3 m) long and 16 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

CarriesRoad
CrossesSwamp Creek
LocationNo Data Entered
RouteFederal Lands Road 32000
Coordinates48.9054, -121.68725
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating95.1 US tons
Inventory rating59.1 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 25 or greater
Structure length60 ft (18.3 m)
Longest span58 ft (17.7 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (1996)
Projected traffic120 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 Swamp Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is Road over Swamp Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2021.

How much traffic does Road over Swamp Creek carry?

About 80 vehicles per day (1996 count).

How long is Road over Swamp Creek?

The structure is 60 ft (18.3 m) long with a longest span of 58 ft (17.7 m) and a deck 16 ft wide.

Who owns Road over Swamp Creek?

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