US Bridges

US 12 over Np RY

Fair

Grays Harbor County, Washington · 10.0 E JCT SR 107 · Structure no. 0007327B0000000

Built
1964
61 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
134 ft
3 main spans
Daily traffic
12,077
2023 count
Owner
State
State Highway Agency

About this bridge

US 12 over Np RY is a prestressed concrete stringer/multi-beam or girder carrying US 12 over Np RY in Grays Harbor 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 12,077 vehicles a day, roughly 10% of them trucks, projected to reach 13,699 by 2039. The structure is 134 ft (40.8 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 12
CrossesNp RY
Location10.0 E JCT SR 107
RouteU.S. Route 12
CountyGrays Harbor County
StateWashington
Coordinates47.00303, -123.39544
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86 US tons
Inventory rating51 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length134 ft (40.8 m)
Longest span42 ft (12.8 m)
Deck width35 ft (10.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,077 (2023)
Projected traffic13,699 by 2039
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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$2.5 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 12 over Np RY built?

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

What condition is US 12 over 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 September 2023.

How much traffic does US 12 over Np RY carry?

About 12,077 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is US 12 over Np RY?

The structure is 134 ft (40.8 m) long with a longest span of 42 ft (12.8 m) and a deck 35 ft wide.

Who owns US 12 over Np RY?

It is owned by the State Highway Agency.