US Bridges

Elfendahl Pass RD over Stimson Creek

Good

Mason County, Washington · 0.17 N JCT N. Shore RD · Structure no. 088578000000000

Built
2013
12 years old
Condition
Good
inspected August 2023
Type
Slab
Concrete
Length
38 ft
1 main span
Daily traffic
65
2020 count
Owner
County
County Highway Agency

About this bridge

Elfendahl Pass RD over Stimson Creek is a concrete slab carrying Elfendahl Pass RD over Stimson Creek in Mason County, Washington. It was built in 2013, so it is 12 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 65 vehicles a day, roughly 10% of them trucks, projected to reach 115 by 2040. The structure is 38 ft (11.6 m) long and 29 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesElfendahl Pass RD
CrossesStimson Creek
Location0.17 N JCT N. Shore RD
RouteCounty Highway 80610
Coordinates47.41908, -122.90869
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.4 US tons
Inventory rating43.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length38 ft (11.6 m)
Longest span36 ft (11 m)
Deck width29 ft (8.8 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic65 (2020)
Projected traffic115 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$505,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Elfendahl Pass RD over Stimson Creek built?

It was built in 2013, making it 12 years old in 2025.

What condition is Elfendahl Pass RD over Stimson 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 August 2023.

How much traffic does Elfendahl Pass RD over Stimson Creek carry?

About 65 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Elfendahl Pass RD over Stimson Creek?

The structure is 38 ft (11.6 m) long with a longest span of 36 ft (11 m) and a deck 29 ft wide.

Who owns Elfendahl Pass RD over Stimson Creek?

It is owned by the County Highway Agency.