US Bridges

US 12 over Scatter Creek

Fair

Thurston County, Washington · 4.5 E Grays Hbr CO · Structure no. 0001000C0000000

Built
1926
99 years old
Condition
Fair
inspected October 2024
Type
Slab
Concrete Continuous
Length
62 ft
3 main spans
Daily traffic
13,337
2023 count
Owner
State
State Highway Agency

About this bridge

US 12 over Scatter Creek is a concrete continuous slab carrying US 12 over Scatter Creek in Thurston County, Washington. It was built in 1926, so it is 99 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 13,337 vehicles a day, roughly 9% of them trucks, projected to reach 19,933 by 2039. The structure is 62 ft (18.9 m) long and 27 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesUS 12
CrossesScatter Creek
Location4.5 E Grays Hbr CO
RouteU.S. Route 12
CountyThurston County
StateWashington
Coordinates46.81652, -123.06733
Functional classRural Principal Arterial - Other

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.7 US tons
Inventory rating42.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length62 ft (18.9 m)
Longest span20 ft (6.1 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,337 (2023)
Projected traffic19,933 by 2039
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 12 over Scatter Creek built?

It was built in 1926, making it 99 years old in 2025.

What condition is US 12 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 October 2024.

How much traffic does US 12 over Scatter Creek carry?

About 13,337 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is US 12 over Scatter Creek?

The structure is 62 ft (18.9 m) long with a longest span of 20 ft (6.1 m) and a deck 27 ft wide.

Who owns US 12 over Scatter Creek?

It is owned by the State Highway Agency.