US Bridges

W Uncas Road over Snow Creek

Fair

Jefferson County, Washington · 0.1W JCT SR101 · Structure no. 084882000000000

Built
1964
61 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete
Length
61 ft
1 main span
Daily traffic
103
2019 count
Owner
County
County Highway Agency

About this bridge

W Uncas Road over Snow Creek is a concrete slab carrying W Uncas Road over Snow Creek in Jefferson County, Washington. It was built in 1964, so it is 61 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 103 vehicles a day, roughly 5% of them trucks, projected to reach 224 by 2042. The structure is 61 ft (18.5 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesW Uncas Road
CrossesSnow Creek
Location0.1W JCT SR101
RouteCounty Highway 50020
CountyJefferson County
StateWashington
Coordinates47.96889, -122.88472
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length61 ft (18.5 m)
Longest span36 ft (11 m)
Deck width30 ft (9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic103 (2019)
Projected traffic224 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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$2.6 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was W Uncas Road over Snow Creek built?

It was built in 1964, making it 61 years old in 2025.

What condition is W Uncas Road over Snow 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 April 2023.

How much traffic does W Uncas Road over Snow Creek carry?

About 103 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is W Uncas Road over Snow Creek?

The structure is 61 ft (18.5 m) long with a longest span of 36 ft (11 m) and a deck 30 ft wide.

Who owns W Uncas Road over Snow Creek?

It is owned by the County Highway Agency.