US Bridges

SR 108 over Little Skookum Creek

Good

Mason County, Washington · 7.7 E Grays Hbr CO · Structure no. 0018849A0000000

Built
2016
9 years old
Condition
Good
inspected November 2024
Type
Culvert
Concrete
Length
22 ft
1 main span
Daily traffic
11,722
2023 count
Owner
State
State Highway Agency

About this bridge

SR 108 over Little Skookum Creek is a concrete culvert carrying SR 108 over Little Skookum Creek in Mason County, Washington. It was built in 2016, so it is 9 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 11,722 vehicles a day, roughly 8% of them trucks, projected to reach 15,499 by 2039. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 3.7 mi (6 km).

CarriesSR 108
CrossesLittle Skookum Creek
Location7.7 E Grays Hbr CO
RouteState Highway 108
Coordinates47.13064, -123.10006
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.4 US tons
Inventory rating47.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length22 ft (6.7 m)
Longest span20 ft (6.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,722 (2023)
Projected traffic15,499 by 2039
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 108 over Little Skookum Creek built?

It was built in 2016, making it 9 years old in 2025.

What condition is SR 108 over Little Skookum Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.

How much traffic does SR 108 over Little Skookum Creek carry?

About 11,722 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is SR 108 over Little Skookum Creek?

The structure is 22 ft (6.7 m) long with a longest span of 20 ft (6.1 m).

Who owns SR 108 over Little Skookum Creek?

It is owned by the State Highway Agency.