US Bridges

Eckert Road over Case Inlet

FairPosted for load

Mason County, Washington · 0.15 E Grapeview Loop RD · Structure no. 080725000000000

Built
1920
105 years old, rebuilt 1973
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
361 ft
18 main spans
Daily traffic
385
2020 count
Owner
County
County Highway Agency

About this bridge

Eckert Road over Case Inlet is a wood or timber stringer/multi-beam or girder carrying Eckert Road over Case Inlet in Mason County, Washington. It was built in 1920 and reconstructed in 1973, so it is 105 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. Its operating status is: posted for load restriction.

It carries about 385 vehicles a day, roughly 5% of them trucks, projected to reach 312 by 2044. The structure is 361 ft (110 m) long and 26 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesEckert Road
CrossesCase Inlet
Location0.15 E Grapeview Loop RD
RouteCounty Highway 64500
CountyMason County
StateWashington
Coordinates47.32833, -122.83211
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating19 US tons
Inventory rating15 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans18
Design loadHS 15
Structure length361 ft (110 m)
Longest span25 ft (7.6 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic385 (2020)
Projected traffic312 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$4.5 million (2022 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Eckert Road over Case Inlet built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1973.

What condition is Eckert Road over Case Inlet 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 Eckert Road over Case Inlet carry?

About 385 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Eckert Road over Case Inlet?

The structure is 361 ft (110 m) long with a longest span of 25 ft (7.6 m) and a deck 26 ft wide.

Who owns Eckert Road over Case Inlet?

It is owned by the County Highway Agency.