US Bridges

SR 3 over Johns Creek

Fair

Mason County, Washington · 6.6 N JCT US 101 · Structure no. 0003458A0000000

Built
1948
77 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete Continuous
Length
82 ft
4 main spans
Daily traffic
15,751
2023 count
Owner
State
State Highway Agency

About this bridge

SR 3 over Johns Creek is a concrete continuous slab carrying SR 3 over Johns Creek in Mason County, Washington. It was built in 1948, so it is 77 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 15,751 vehicles a day, roughly 6% of them trucks, projected to reach 19,949 by 2039. The structure is 82 ft (25 m) long and 40 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesSR 3
CrossesJohns Creek
Location6.6 N JCT US 101
RouteState Highway 3
CountyMason County
StateWashington
Coordinates47.24808, -123.04542
Functional classUrban Other Principal 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.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.2 US tons
Inventory rating37.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length82 ft (25 m)
Longest span22 ft (6.7 m)
Deck width40 ft (12.2 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,751 (2023)
Projected traffic19,949 by 2039
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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$1.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 3 over Johns Creek built?

It was built in 1948, making it 77 years old in 2025.

What condition is SR 3 over Johns 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 May 2023.

How much traffic does SR 3 over Johns Creek carry?

About 15,751 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is SR 3 over Johns Creek?

The structure is 82 ft (25 m) long with a longest span of 22 ft (6.7 m) and a deck 40 ft wide.

Who owns SR 3 over Johns Creek?

It is owned by the State Highway Agency.