US Bridges

183rd SW over Scatter Creek

Fair

Thurston County, Washington · 0.5 M W of Sargent RD Int · Structure no. 084678000000000

Built
1949
76 years old
Condition
Fair
inspected June 2024
Type
Frame
Concrete Continuous
Length
68 ft
3 main spans
Daily traffic
2,813
2020 count
Owner
County
County Highway Agency

About this bridge

183rd SW over Scatter Creek is a concrete continuous frame carrying 183rd SW over Scatter Creek in Thurston County, Washington. It was built in 1949, so it is 76 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 2,813 vehicles a day, roughly 10% of them trucks, projected to reach 4,349 by 2042. The structure is 68 ft (20.7 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries183rd SW
CrossesScatter Creek
Location0.5 M W of Sargent RD Int
RouteCounty Highway 16125
CountyThurston County
StateWashington
Coordinates46.82207, -123.0509
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
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 inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84 US tons
Inventory rating50 US tons

Structure

Structure typeFrame
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length68 ft (20.7 m)
Longest span25 ft (7.6 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,813 (2020)
Projected traffic4,349 by 2042
Trucks10%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.8 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 183rd SW over Scatter Creek built?

It was built in 1949, making it 76 years old in 2025.

What condition is 183rd SW over Scatter 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 June 2024.

How much traffic does 183rd SW over Scatter Creek carry?

About 2,813 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is 183rd SW over Scatter Creek?

The structure is 68 ft (20.7 m) long with a longest span of 25 ft (7.6 m) and a deck 26 ft wide.

Who owns 183rd SW over Scatter Creek?

It is owned by the County Highway Agency.