US Bridges

Road over Silver Creek

Fair

Pierce County, Washington · 0.3MI E of Hy 410/7175JCT · Structure no. 060507000001298

Built
1955
70 years old, rebuilt 2003
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
53 ft
1 main span
Daily traffic
10
1995 count
Owner
Federal
U.S. Forest Service

About this bridge

Road over Silver Creek is a wood or timber stringer/multi-beam or girder carrying Road over Silver Creek in Pierce County, Washington. It was built in 1955 and reconstructed in 2003, so it is 70 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 10 vehicles a day, projected to reach 15 by 2045. The structure is 53 ft (16.1 m) long and 16 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesRoad
CrossesSilver Creek
Location0.3MI E of Hy 410/7175JCT
RouteFederal Lands Road 71750
Coordinates46.9972, -121.52366
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating29 US tons
Inventory rating22 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length53 ft (16.1 m)
Longest span45 ft (13.7 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (1995)
Projected traffic15 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Silver Creek built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 2003.

What condition is Road over Silver Creek 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 September 2024.

How much traffic does Road over Silver Creek carry?

About 10 vehicles per day (1995 count).

How long is Road over Silver Creek?

The structure is 53 ft (16.1 m) long with a longest span of 45 ft (13.7 m) and a deck 16 ft wide.

Who owns Road over Silver Creek?

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