US Bridges

SR 105 over Johns River

Fair

Grays Harbor County, Washington · 7.0 N JCT SR 105 SP · Structure no. 0004106A0000000

Built
1952
73 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
583 ft
3 main spans
Daily traffic
6,124
2023 count
Owner
State
State Highway Agency

About this bridge

SR 105 over Johns River is a steel continuous stringer/multi-beam or girder carrying SR 105 over Johns River in Grays Harbor County, Washington. It was built in 1952, so it is 73 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 6,124 vehicles a day, roughly 6% of them trucks, projected to reach 7,343 by 2039. The structure is 583 ft (177.7 m) long and 34 ft wide. If it were closed, the detour would be 70.8 mi (114 km).

Location

Open in Google Maps
CarriesSR 105
CrossesJohns River
Location7.0 N JCT SR 105 SP
RouteState Highway 105
CountyGrays Harbor County
StateWashington
Coordinates46.89914, -123.99953
Functional classRural Minor Arterial

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 inspectionApril 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating29 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+6 approach)
Design loadHS 20
Structure length583 ft (177.7 m)
Longest span120 ft (36.6 m)
Deck width34 ft (10.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,124 (2023)
Projected traffic7,343 by 2039
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed70.8 mi (114 km)
TollOn a free road
National Highway SystemNo

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$11.1 million (2022 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was SR 105 over Johns River built?

It was built in 1952, making it 73 years old in 2025.

What condition is SR 105 over Johns River 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 April 2024.

How much traffic does SR 105 over Johns River carry?

About 6,124 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is SR 105 over Johns River?

The structure is 583 ft (177.7 m) long with a longest span of 120 ft (36.6 m) and a deck 34 ft wide.

Who owns SR 105 over Johns River?

It is owned by the State Highway Agency.