US Bridges

US 12 over Sylvia CR Np RY

Fair

Grays Harbor County, Washington · 9.7 E JCT US 101 · Structure no. 0008172B0000000

Built
1968
57 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,094 ft
14 main spans
Daily traffic
10,810
2023 count
Owner
State
State Highway Agency

About this bridge

US 12 over Sylvia CR Np RY is a prestressed concrete stringer/multi-beam or girder carrying US 12 over Sylvia CR Np RY in Grays Harbor County, Washington. It was built in 1968, so it is 57 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 10,810 vehicles a day, roughly 8% of them trucks, projected to reach 12,190 by 2039. The structure is 1,094 ft (333.5 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 12
CrossesSylvia CR Np RY
Location9.7 E JCT US 101
RouteU.S. Route 12
CountyGrays Harbor County
StateWashington
Coordinates46.9743, -123.61658
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 protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating25.4 US tons
Inventory rating19.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans14
Design loadHS 20 + Mod
Structure length1,094 ft (333.5 m)
Longest span86 ft (26.2 m)
Deck width36 ft (11.1 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,810 (2023)
Projected traffic12,190 by 2039
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

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$18.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 12 over Sylvia CR Np RY built?

It was built in 1968, making it 57 years old in 2025.

What condition is US 12 over Sylvia CR Np RY 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 2023.

How much traffic does US 12 over Sylvia CR Np RY carry?

About 10,810 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is US 12 over Sylvia CR Np RY?

The structure is 1,094 ft (333.5 m) long with a longest span of 86 ft (26.2 m) and a deck 36 ft wide.

Who owns US 12 over Sylvia CR Np RY?

It is owned by the State Highway Agency.