US Bridges

Shelton Matlock RD over No. Fork Goldsborough Ck

Fair

Mason County, Washington · 0.23 E Dayton Airport RD · Structure no. 085640000000000

Built
1988
37 years old
Condition
Fair
inspected June 2024
Type
Culvert
Steel
Length
40 ft
2 main spans
Daily traffic
1,777
2020 count
Owner
County
County Highway Agency

About this bridge

Shelton Matlock RD over No. Fork Goldsborough Ck is a steel culvert carrying Shelton Matlock RD over No. Fork Goldsborough Ck in Mason County, Washington. It was built in 1988, so it is 37 years old, younger 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 5 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 1,777 vehicles a day, roughly 20% of them trucks, projected to reach 5,000 by 2040. The structure is 40 ft (12.3 m) long and 37 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

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CarriesShelton Matlock RD
CrossesNo. Fork Goldsborough Ck
Location0.23 E Dayton Airport RD
RouteCounty Highway 90100
CountyMason County
StateWashington
Coordinates47.22697, -123.22136
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating54 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadH 20
Structure length40 ft (12.3 m)
Longest span18 ft (5.5 m)
Deck width37 ft (11.2 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,777 (2020)
Projected traffic5,000 by 2040
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$500,000 (2040 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Shelton Matlock RD over No. Fork Goldsborough Ck built?

It was built in 1988, making it 37 years old in 2025.

What condition is Shelton Matlock RD over No. Fork Goldsborough Ck 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 June 2024.

How much traffic does Shelton Matlock RD over No. Fork Goldsborough Ck carry?

About 1,777 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is Shelton Matlock RD over No. Fork Goldsborough Ck?

The structure is 40 ft (12.3 m) long with a longest span of 18 ft (5.5 m) and a deck 37 ft wide.

Who owns Shelton Matlock RD over No. Fork Goldsborough Ck?

It is owned by the County Highway Agency.