County profile · official public datasets

Kitsap County, WA

115 public highway bridges tracked in the FHWA National Bridge Inventory: 71.3% rated Good, 27.8% Fair, 0.9% Poor.

115
Public bridges: 71.3%
Good condition: 0.9%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Kitsap County pairs a top-10% lowest Poor-condition share among rated counties in the state with a newer average build year than the state inventory.

Top 8%
lowest Poor share in state: 0.9%
Poor-condition share: 115
public highway bridges: 1989
avg year built

Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.

Kitsap County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Kitsap County ranks #3 of 39 Washington counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 0.9%). Kitsap County, Washington contains 115 public highway bridges. Roughly 71.3% are rated “Good,” 27.8% “Fair,” and 0.9% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

Total bridges

115

Public highway bridges in Kitsap County

Good condition

71.3%

82 of 115 rated 7-9

Fair condition

27.8%

32 of 115 rated 5-6

Poor condition

0.9%

1 of 115 rated 4 or below

In-state Poor-share rank

#3 of 39

Among Washington counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 115 NBI-tracked bridges by lowest applicable component rating.

Good

71.3% (82)

Fair

27.8% (32)

Poor

0.9% (1)

Kitsap County's Poor-condition bridges carry 17,634 vehicle crossings a day

That is 1.4% of the county's reported daily bridge traffic on 0.9% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 17,634 crossings a day against 11,126 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.

Computed over the 115 of 115 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

23.5% of Kitsap County's bridges have passed the 50-year mark

27 of the 115 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 71.3% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.

Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.

One structure carries 100% of the county's Poor-condition bridge traffic

SR 104 EAST HALF over HOOD CANAL, built 2009, carries 17,634 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 1-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 17,634 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1930s

1
1940s

1
1950s

8
1960s

6
1970s

19
1980s

25
1990s

15
2000s

20
2010s

18
2020s

2

What this shows Construction peaked in the 1980s, when 25 of the county's bridges still in the inventory were built, which is 21.7% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year is 1989, 14 years newer than the Washington average of 1975.

How Kitsap County compares with Washington's closest counties by inventory size

The 5 Washington counties nearest Kitsap County in number of bridges, with their condition splits. Its 0.9% Poor share is the 1st-lowest of these 6. Its average build year of 1989 against a peer-group mean of 1975 is 14 years newer.

Showing the 5 closest of 38 Washington counties eligible for comparison.

Bridge inventory size and condition shares for Kitsap County and the 5 Washington counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Franklin County	134	56%	39.6%	4.5%	1970
Mason County	133	53.4%	42.1%	4.5%	1975
Pacific County	120	56.7%	37.5%	5.8%	1974
Skamania County	120	45.8%	45%	9.2%	1974
Kitsap County (this page)	115	71.3%	27.8%	0.9%	1989
Jefferson County	99	57.6%	38.4%	4%	1982

Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Kitsap County's. Source: FHWA National Bridge Inventory, 2024 release.

Nationwide counties with similar inventory size or average build year

Two NBI-derived peer sets for Kitsap County, both outside Washington so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside WA (115 bridges here).

Alachua County, FL · 115 bridges
Walton County, GA · 115 bridges
Latah County, ID · 115 bridges
Whitley County, IN · 115 bridges

Similar average build year

Nearest mean year-built outside WA (1989 here).

Harris County, TX · avg 1989 · 4,029 bridges
Mecklenburg County, NC · avg 1989 · 746 bridges
Buffalo County, NE · avg 1989 · 459 bridges
Brazos County, TX · avg 1989 · 370 bridges

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 115 Good 82 Fair 32 Poor 1

Good-condition bridges (82)

Sort:

Kitsap County Bridge Snapshot

Condition distribution

Kitsap County's Poor-condition bridges carry 17,634 vehicle crossings a day

23.5% of Kitsap County's bridges have passed the 50-year mark

One structure carries 100% of the county's Poor-condition bridge traffic

How Kitsap County compares with Washington's closest counties by inventory size

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

Good-condition bridges (82)

SR 304 BUS TRANSIT

SR 305

SR 304

SR 160

BELFAIR CAMPGROUND

SR 104

SILVERDALE WAY

SR 16 NB

SR 16 SB

N-W RAMP TO LUOTO

CLEAR CREEK ROAD

SE OAK ROAD

NB SR 16 SPUR

TRIGGER AVE

SR 305

SEABECK HWY NW

SR 3

SR 3 NB

BROWNSVILLE HWY

BROWNSVILLE

TRACYTON BLVD

NW Lindvig Way

HOLLY ROAD

SR 16 RAMP

SR 3

SR 3

SR160

SR 303 (WAAGA WAY)

AMBERJACK AVENUE

AUSTIN DRIVE

RIDGETOP BLVD NW

SR 3

SR 308

MYHRE ROAD

CITY STREET

SR 16

SR 16

SR307

CLEAR CREEK RD NW

SR 3

SR 3

NW WILDCAT LAKE RD

SAM CHRISTOPHERSON

SOUTHWORTH DRIVE

NW TAYLOR ROAD

NW BUCKLIN HILL RD

GOLF CLUB HILL RD

W BELFAIR VALY RD

SR 303

SR 3

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