US Bridges

Blanchard Road over Scammon Creek

Fair

Lewis County, Washington · 1.0 SW Centralia · Structure no. 081715000000000

Built
1955
70 years old, rebuilt 1987
Condition
Fair
inspected January 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
32 ft
1 main span
Daily traffic
173
2022 count
Owner
County
County Highway Agency

About this bridge

Blanchard Road over Scammon Creek is a concrete stringer/multi-beam or girder carrying Blanchard Road over Scammon Creek in Lewis County, Washington. It was built in 1955 and reconstructed in 1987, 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 173 vehicles a day, roughly 14% of them trucks, projected to reach 313 by 2042. The structure is 32 ft (9.8 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesBlanchard Road
CrossesScammon Creek
Location1.0 SW Centralia
RouteCounty Highway 14004
CountyLewis County
StateWashington
Coordinates46.70591, -123.01363
Functional classUrban 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to 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 rating66 US tons
Inventory rating39 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic173 (2022)
Projected traffic313 by 2042
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$334,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Blanchard Road over Scammon Creek built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1987.

What condition is Blanchard Road over Scammon 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 January 2023.

How much traffic does Blanchard Road over Scammon Creek carry?

About 173 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is Blanchard Road over Scammon Creek?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 31 ft wide.

Who owns Blanchard Road over Scammon Creek?

It is owned by the County Highway Agency.