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:

YESLER WAY

Over: I-5

1.2 N JCT I-90, King, WA

Built 1965 ADT: 139,825

N-W RAMP

Over: I-5

6.9 N JCT SR 900, King, WA

Built 1966 ADT: 139,825

I-90 W-S RAMP

Over: I-5

6.9 N JCT SR 900, King, WA

Built 1965 ADT: 139,825

I-90

Over: I-5

6.9 N JCT SR 900, King, WA

Built 1966 ADT: 139,825

E-N RAMP

Over: I-5

6.9 N JCT SR 900, King, WA

Built 1965 ADT: 139,825

I-5 S-E RAMP

Over: I-5, RAMPS, RAILROAD

7.1 N JCT SR 900, King, WA

Built 1965 ADT: 139,825

I-5

Over: DEARBORN ST

JCT I-90, King, WA

Built 1965 ADT: 21,770

I-5

Over: DEARBORN ST

JCT I-90, King, WA

Built 1965 ADT: 21,770

I-5 NBCD

Over: DEARBORN ST

JCT I-90, King, WA

Built 1965 ADT: 21,770

I-5 SBCD

Over: DEARBORN ST

JCT I-90, King, WA

Built 1965 ADT: 21,770

S-W RAMP

Over: AIRPORT WAY S

JCT I-90, King, WA

Built 1966 ADT: 5,480

I-90 WCD RAMP

Over: DEARBORN STREET

JCT I-90, King, WA

Built 1965 ADT: 20,500

DEARBORN-N RAMP

Over: I-5 NBCD

JCT I-90, King, WA

Built 1965 ADT: 15,180

I-90

Over: I-5

JCT I-5, King, WA

Built 1966 ADT: 9,982

I-405

Over: N-W RAMP

3.6 N JCT I-90, King, WA

Built 1965 ADT: 8,168

I-405

Over: N-W RAMP

3.6 N JCT I-90, King, WA

Built 1966 ADT: 8,168

I-405

Over: SR 520

JCT I-405, King, WA

Built 1966 ADT: 86,292

I-405

Over: SR 520

JCT I-405, King, WA

Built 1966 ADT: 86,292

N-W RAMP

Over: SR 520

JCT I-405, King, WA

Built 1966 ADT: 64,231

S 144TH ST

Over: I-5, SOUND TRANSIT RR

0.9 N JCT I-405, King, WA

Built 1965 ADT: 230,246

I-5 P1 15559 RAMP

Over: I-5, HOV LANE

1.5 N JCT I-405, King, WA

Built 1966 ADT: 169,761

I-5

Over: INTERURBAN AVE

0.1 N JCT SR 599, King, WA

Built 1966 ADT: 17,498

I-5

Over: INTERURBAN AVE

0.1 N JCT SR 599, King, WA

Built 1966 ADT: 20,516

S BOEING ACCESS RD

Over: I-5

0.5 N JCT SR 900, King, WA

Built 1966 ADT: 185,464

SR 599

Over: I-5 (SB LANES ONLY)

1.5 N JCT I-405, King, WA

Built 1966 ADT: 84,881

SR 900

Over: I-5

1.6 N JCT SR 599, King, WA

Built 1966 ADT: 190,540

SR 900

Over: I-5

1.3 N JCT SR 599, King, WA

Built 1966 ADT: 188,568

NE 44TH ST

Over: I-405

2.0 N JCT SR 900, King, WA

Built 1965 ADT: 137,350

LAKE WASHINGTON BV

Over: I-405

3.8 N JCT SR 900, King, WA

Built 1965 ADT: 143,139

I-405

Over: COAL CREEK PARKWAY SE

4.8 N JCT SR 900, King, WA

Built 1965 ADT: 29,232

I-405

Over: COAL CREEK PARKWAY SE

4.8 N JCT SR 900, King, WA

Built 1965 ADT: 29,232

ALBRO ST

Over: I-5

3.9 N JCT SR 900, King, WA

Built 1966 ADT: 190,268

BEACON-HOLGATE

Over: I-5

6.5 N JCT SR 900, King, WA

Built 1966 ADT: 247,063

I-5

Over: N-W RAMP

3.9 N JCT SR 900, King, WA

Built 1966 ADT: 3,978

E-N RAMP

Over: I-5

3.9 N JCT SR 900, King, WA

Built 1966 ADT: 190,268

NB I5 OFF RAMP

Over: W-S, I5, EB W SEA FRWY

5.6 N JCT SR 900, King, WA

Built 1967 ADT: 189,801

I-5 N - 6TH RAMP

Over: E-6TH RAMP EB LANES

5.6 N JCT SR 900, King, WA

Built 1967 ADT: 28,260

E-N RAMP

Over: I-5

5.6 N JCT SR 900, King, WA

Built 1966 ADT: 189,801

W-S RAMP

Over: I-5 MAINLINE AND RAMPS

5.6 N JCT SR 900, King, WA

Built 1967 ADT: 189,801

I-5

Over: E-S RAMP BR

5.5 N JCT SR 900, King, WA

Built 1967 ADT: 2,500

I-5

Over: 6TH-S RAMP BR

5.5 N JCT SR 900, King, WA

Built 1967 ADT: 2,500

I-5 SB OFF RAMP

Over: S-E RAMP TO COLUMBIA WAY

5.6 N JCT SR 900, King, WA

Built 1967 ADT: 189,801

SPOKANE ST WB LANE

Over: I-5

5.6 N JCT SR 900, King, WA

Built 1967 ADT: 189,801

SPOKANE ST EB LANE

Over: I-5

5.5 N JCT SR 900, King, WA

Built 1966 ADT: 189,801

I-405

Over: SR 900 / N PARK DR

JCT I-405, King, WA

Built 1966 ADT: 25,253

I-405

Over: SR 900 / N PARK DR

JCT I-405, King, WA

Built 1966 ADT: 25,253

SR 520

Over: 108TH AVE NE

5.2 E JCT SR 513, King, WA

Built 1966 ADT: 15,083

S 129TH ST

Over: I-5

0.5 N JCT SR 599, King, WA

Built 1966 ADT: 188,568

RAMP TO I-5 NB/SB

Over: CITY STS, RAMP & RR

3.8 N JCT SR 900, King, WA

Built 1966 ADT: 13,467

N-N RAMP

Over: SR 599 SB / SR 99 SB

1.7 N JCT I-5, King, WA

Built 1966 ADT: 20,073

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.