King County, WA

1,364 public highway bridges

King County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, King County, Washington contains 1,364 public highway bridges. Roughly 31% are rated “Good,” 33.4% “Fair,” and 3.3% “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.

1,364

Total Bridges

31%

Good

33.4%

Fair

3.3%

Poor Condition

Condition Distribution

Good

31% (423)

Fair

33.4% (456)

Poor

3.3% (45)

All Bridges (1,364)

Sort:

CENTRAL LINK

Over: MLK WAY SOUTH

SOUTHBOUND MP 1.68, King, WA

Built 2008 ADT: 3,800

None

Over: 9th Ave

9th Ave, Jefferson/Alder, King, WA

Built 2007 ADT: 1,300

CENTRAL LINK

Over: MLK (S)

.1 MI E OF I-5, King, WA

Built 2008 ADT: 31,700

PEDESTRIAN

Over: PIKE ST

S/O 8th Ave & Pike St, King, WA

Built 2002 ADT: 10,000

CENTRAL LINK

Over: SOUTH CENTER BLVD

0.2 M SOUTH OF S144TH ST, King, WA

Built 2008 ADT: 10,000

Central Conn Trail

Over: 154TH AVE NE

0.5 MI N OF SR-520, King, WA

Built 1960 ADT: 27,900

CENTRAL LINK

Over: BOEING ACCESS RD s

0.1 MI E OF I-5, King, WA

Built 2008 ADT: 33,000

CENTRAL LINK

Over: AIRPRT WAY RAMP

.2 MI W OF I-5, King, WA

Built 2008 ADT: 116,000

CENTRAL LINK

Over: E MARGINAL WAY

.3 MI W OF I-5, King, WA

Built 2008 ADT: 10,000

CENTRAL LINK

Over: E MARGINAL WAY

.1 MI W OF SR 181, King, WA

Built 2008 ADT: 10,000

CENTRAL LINK

Over: S. 112TH STREET

.4 MI W OF I-5, King, WA

Built 2008 ADT: 10,000

CENTRAL LINK

Over: GATEWAY DRIVE

.1 MI W of SR 599, King, WA

Built 2008 ADT: 10,000

CENTRAL LINK

Over: 51ST STREET BRIDGE

.15 N of SR518, King, WA

Built 2008 ADT: 5,000

CENTRAL LINK

Over: S 42ND AVE

.1 MI N of SR518, King, WA

Built 2008 ADT: 5,000

CENTRAL LINK

Over: 42nd AVE/MACADAM

.1 MI S of SR 599, King, WA

Built 2008 ADT: 10,000

CENTRAL LINK

Over: AIRPORT WAY RAMP

.25 MI W OF I-5, King, WA

Built 2008 ADT: 116,000

King county ped br

Over: 4th Ave

King Cty Admn- Courthouse, King, WA

Built 1984 ADT: 16,590

PEDESTRIAN

Over: MONTLAKE BLVD (SR513)

0.9 N JCT SR 520, King, WA

Built 1958 ADT: 41,913

PEDESTRIAN

Over: MONTLAKE BLVD (SR513)

0.8 N JCT SR 520, King, WA

Built 1958 ADT: 41,913

CENTRAL LINK

Over: S 170 ST

0.13 MILES WEST OF HWY 99, King, WA

Built 2008 ADT: 15,000

PEDESTRIANS

Over: SR 99

3.6 N JCT SR 516, King, WA

Built 2008 ADT: 24,576

CENTRAL LINK

Over: SR 99/TUKWILA INTL BLVD

4.9 N JCT SR 516, King, WA

Built 2008 ADT: 30,110

CENTRAL LINK

Over: W-S RAMP TO SR 99

JCT SR 99 AND SR 518, King, WA

Built 2008 ADT: 10,789

CENTRAL LINK

Over: W-S RAMP TO AIRPORT

2.3 E JCT SR 509, King, WA

Built 2008 ADT: 20,213

CENTRAL LINK

Over: N-W RAMP TO SR 518

JCT SR 99 AND SR 518, King, WA

Built 2008 ADT: 4,108

PEDESTRIAN PATH

Over: HIGHLANDS DR NE

YWCA FAMILY VILLAGE, King, WA

PEDESTRIAN PATH

Over: HIGHLANDS DR NE

C DR NE, King, WA

Built 2012 ADT: 32,000

WILDLIFE CORRIDOR

Over: NOVELTY HILL RD

2.5 MI N OF SR 202, King, WA

Built 2013 ADT: 21,200

CENTRAL LINK

Over: AIR CARGO RD

0.2 MI W OF SR-99, King, WA

Built 2015 ADT: 25,000

CENTRAL LINK

Over: S 188TH STREET

1.1 MI W OF SR-99, King, WA

Built 2015 ADT: 50,000

Ped

Over: Western Ave W

W Thomas St / Western Ave, King, WA

Built 2012 ADT: 45,001

ERC TRAIL

Over: LAKE WASHINGTON BLVD

0.1M W COAL CR PKWY/I-405, King, WA

Built 1916 ADT: 7,840

PEDESTRIANS

Over: EASTLAKE

1100 Eastlake Ave E, King, WA

Built 2014 ADT: 6,558

Cross Kirkland Cor

Over: Kirkland Way

.42 W I405 & 85th, King, WA

Built 1900 ADT: 1

Coss Kirkland Cor

Over: NE 68th Street

.16 W 108th Ave N.E., King, WA

Built 1900 ADT: 1

MONORAIL

Over: SEATTLE CITY STREETS

WESTLAKE MALL, King, WA

Built 1961 ADT: 17,700

S 224TH STREET

Over: SR 167, 88TH AVE S

1.7 N JCT SR 516, King, WA

Built 2019 ADT: 11,462

BNSF MAIN LINE

Over: M Street

0.1 MI N OF SR 18, King, WA

Built 2014 ADT: 6,000

BNSF SIDING LINE

Over: M STREET

0.1 MI N OF SR 18, King, WA

Built 2018 ADT: 6,000

Pedestrian

Over: I-5

NE 100th St at I-5 Inters, King, WA

Built 2022 ADT: 94,239

ROAD

Over: S FK SNOQUALMIE RIVER

.2 MI S OF I-90/9035 JCT, King, WA

Built 1927 ADT: 50

ROSS DAM INTAKE

Over: SKAGIT RIVER

Ross Dam, King, WA

POWERLINE RD

Over: OLSON CREEK

Powerline Rd, King, WA

Built 1900 Load: 5.8 t ADT: 25

S MAIN ST

Over: RR

S Main St, 3rd - 4th Ave, King, WA

Built 1982 Load: 6.3 t ADT: 2,300

SE GREEN VALLEY RD

Over: GREEN RIVER

1.5 MI E OF SR-18, King, WA

Built 1950 Load: 8.1 t ADT: 2,500

NE CARNATION FARM

Over: SNOQUALMIE RIVER

0.8 MI W OF SR-203, King, WA

Built 1951 Load: 9.1 t ADT: 1,259

I-90

Over: 4TH AVE NW & TRAIL

1.0 E JCT SR 900, King, WA

Built 1971 Load: 10.7 t ADT: 30,913

PRESTON FALL CITY

Over: RAGING RIVER

2.0 MI NE OF 1-90, King, WA

Built 1962 Load: 11.0 t ADT: 9,212

W NORTH BEND WAY

Over: S FORK SNOQUALMIE RIVER

3.2 MI E OF I-90, King, WA

Built 1941 Load: 11.3 t ADT: 6,500

MCGRAW ST

Over: RAVINE

McGRAW ST & 3RD AVE N, King, WA

Built 1935 Load: 11.8 t ADT: 3,000

Read our methodology - how this data is sourced, computed, and verified.

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

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Compiled by PlainBridges, Independent data publisher

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.