US Bridges

Case Road SW over Scatter Creek

Fair

Thurston County, Washington · 0.7 M N of 183rd Ave SW · Structure no. 084857000000000

Built
1965
60 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete Continuous
Length
66 ft
3 main spans
Daily traffic
2,751
2024 count
Owner
County
County Highway Agency

About this bridge

Case Road SW over Scatter Creek is a concrete continuous slab carrying Case Road SW over Scatter Creek in Thurston County, Washington. It was built in 1965, so it is 60 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 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 2,751 vehicles a day, roughly 15% of them trucks, projected to reach 4,253 by 2041. The structure is 66 ft (20.1 m) long and 26 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesCase Road SW
CrossesScatter Creek
Location0.7 M N of 183rd Ave SW
RouteCounty Highway 10710
CountyThurston County
StateWashington
Coordinates46.83064, -122.99321
Functional classRural Minor 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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.9 US tons
Inventory rating45 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length66 ft (20.1 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 traffic2,751 (2024)
Projected traffic4,253 by 2041
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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$26,000 (2018 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Case Road SW over Scatter Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is Case Road 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 August 2024.

How much traffic does Case Road SW over Scatter Creek carry?

About 2,751 vehicles per day (2024 count), of which roughly 15% are trucks.

How long is Case Road SW over Scatter Creek?

The structure is 66 ft (20.1 m) long with a longest span of 25 ft (7.6 m) and a deck 26 ft wide.

Who owns Case Road SW over Scatter Creek?

It is owned by the County Highway Agency.