US Bridges

Seabeck Hwy. NW over Little Beef Creek

Fair

Kitsap County, Washington · 0.9 W JCT NW Anderson Hil · Structure no. 081938000000000

Built
1955
70 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
110 ft
3 main spans
Daily traffic
5,940
2021 count
Owner
County
County Highway Agency

About this bridge

Seabeck Hwy. NW over Little Beef Creek is a concrete stringer/multi-beam or girder carrying Seabeck Hwy. NW over Little Beef Creek in Kitsap County, Washington. It was built in 1955, so it is 70 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 5,940 vehicles a day, roughly 20% of them trucks, projected to reach 6,534 by 2043. The structure is 110 ft (33.5 m) long and 30 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

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CarriesSeabeck Hwy. NW
CrossesLittle Beef Creek
Location0.9 W JCT NW Anderson Hil
RouteCounty Highway 11709
CountyKitsap County
StateWashington
Coordinates47.65401, -122.79312
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length110 ft (33.5 m)
Longest span70 ft (21.3 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,940 (2021)
Projected traffic6,534 by 2043
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$1.6 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Seabeck Hwy. NW over Little Beef Creek built?

It was built in 1955, making it 70 years old in 2025.

What condition is Seabeck Hwy. NW over Little Beef 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 August 2024.

How much traffic does Seabeck Hwy. NW over Little Beef Creek carry?

About 5,940 vehicles per day (2021 count), of which roughly 20% are trucks.

How long is Seabeck Hwy. NW over Little Beef Creek?

The structure is 110 ft (33.5 m) long with a longest span of 70 ft (21.3 m) and a deck 30 ft wide.

Who owns Seabeck Hwy. NW over Little Beef Creek?

It is owned by the County Highway Agency.