US Bridges

SR 3 over Sherwood Creek

Fair

Mason County, Washington · 20.5 N JCT US 101 · Structure no. 0004133A0000000

Built
1952
73 years old
Condition
Fair
inspected February 2024
Type
Tee Beam
Concrete Continuous
Length
147 ft
3 main spans
Daily traffic
10,739
2023 count
Owner
State
State Highway Agency

About this bridge

SR 3 over Sherwood Creek is a concrete continuous tee beam carrying SR 3 over Sherwood Creek in Mason 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 10,739 vehicles a day, roughly 8% of them trucks, projected to reach 14,054 by 2039. The structure is 147 ft (44.8 m) long and 34 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

Open in Google Maps
CarriesSR 3
CrossesSherwood Creek
Location20.5 N JCT US 101
RouteState Highway 3
CountyMason County
StateWashington
Coordinates47.37505, -122.83582
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating28.5 US tons
Inventory rating22.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length147 ft (44.8 m)
Longest span56 ft (17.1 m)
Deck width34 ft (10.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,739 (2023)
Projected traffic14,054 by 2039
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed21.7 mi (35 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$2.7 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 3 over Sherwood Creek built?

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

What condition is SR 3 over Sherwood 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 February 2024.

How much traffic does SR 3 over Sherwood Creek carry?

About 10,739 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is SR 3 over Sherwood Creek?

The structure is 147 ft (44.8 m) long with a longest span of 56 ft (17.1 m) and a deck 34 ft wide.

Who owns SR 3 over Sherwood Creek?

It is owned by the State Highway Agency.