US Bridges

Robe-Menzel RD over Pilchuck River

Fair

Snohomish County, Washington · 2.2 S JCT SR 92 · Structure no. 084075000000000

Built
1978
47 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
190 ft
1 main span
Daily traffic
2,124
2021 count
Owner
County
County Highway Agency

About this bridge

Robe-Menzel RD over Pilchuck River is a prestressed concrete stringer/multi-beam or girder carrying Robe-Menzel RD over Pilchuck River in Snohomish County, Washington. It was built in 1978, so it is 47 years old, younger 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 2,124 vehicles a day, roughly 14% of them trucks, projected to reach 3,000 by 2042. The structure is 190 ft (57.8 m) long and 31 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

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CarriesRobe-Menzel RD
CrossesPilchuck River
Location2.2 S JCT SR 92
RouteCounty Highway 85951
CountySnohomish County
StateWashington
Coordinates48.05466, -121.95752
Functional classRural Major Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating50 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length190 ft (57.8 m)
Longest span104 ft (31.7 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,124 (2021)
Projected traffic3,000 by 2042
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$7.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Robe-Menzel RD over Pilchuck River built?

It was built in 1978, making it 47 years old in 2025.

What condition is Robe-Menzel RD over Pilchuck River 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 May 2024.

How much traffic does Robe-Menzel RD over Pilchuck River carry?

About 2,124 vehicles per day (2021 count), of which roughly 14% are trucks.

How long is Robe-Menzel RD over Pilchuck River?

The structure is 190 ft (57.8 m) long with a longest span of 104 ft (31.7 m) and a deck 31 ft wide.

Who owns Robe-Menzel RD over Pilchuck River?

It is owned by the County Highway Agency.