King County, WA

1,364 public highway bridges

King County Bridge Snapshot

King County, Washington contains 1,364 public highway bridges in the FHWA National Bridge Inventory. Roughly 31% are rated “Good,” 33.4% “Fair,” 3.3% “Poor,” and 3.3% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in WA are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

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

1,364

Total Bridges

31%

Good

3.3%

Poor

3.3%

Structurally Deficient

Condition Distribution

Good

31% (423)

Fair

33.4% (456)

Poor

3.3% (45)

SD

3.3% (45)

All Bridges (1,364)

Sort:

I-90

Over: SR 18

12.2 E JCT SR 169, King, WA

Built 1963 ADT: 21,327

61ST AVE S

Over: I-405

0.3 N JCT I-5, King, WA

Built 1962 ADT: 108,408

SR 99

Over: SR 518 RIVERTON HTS

1.9 E JCT SR 509, King, WA

Built 1962 ADT: 51,803

I-5

Over: SR 104 / NE 205TH ST

1.3 E JCT SR 99, King, WA

Built 1963 ADT: 43,749

I-5

Over: SR 104 / NE 205TH ST

1.3 E JCT SR 99, King, WA

Built 1963 ADT: 43,749

I-5 NBCD

Over: SR 104

1.3 E JCT SR 99, King, WA

Built 1963 ADT: 43,749

MILITARY RD

Over: I-5

2.0 N JCT SR 516, King, WA

Built 1963 ADT: 209,875

S 208TH ST

Over: SR 167 & SPRINGBROOK CR

3.0 N JCT SR 516, King, WA

Built 1963 ADT: 109,316

S 180TH ST

Over: SR 167

4.8 N JCT SR 516, King, WA

Built 1964 ADT: 106,515

S 216TH ST

Over: I-5

1.1 N JCT SR 516, King, WA

Built 1963 ADT: 209,875

I-5

Over: ORILLIA RD/S 188TH ST

3.1 N JCT SR 516, King, WA

Built 1963 ADT: 29,582

I-5

Over: ORILLIA RD/S 188TH ST

3.1 N JCT SR 516, King, WA

Built 1963 ADT: 29,582

I-5 NB

Over: JAMES, CHERRY, REVERS

0.8 N JCT I-90, King, WA

Built 1964 ADT: 18,166

MADISON ST

Over: I-5

1.2 N JCT I-90, King, WA

Built 1964 ADT: 117,150

SPRING ST

Over: I-5

1.2 N JCT I-90, King, WA

Built 1964 ADT: 117,150

SENECA ST

Over: I-5

1.2 N JCT I-90, King, WA

Built 1964 ADT: 172,787

N-SENECA RAMP

Over: I-5 SB & CITY STREETS

1.2 N JCT I-90, King, WA

Built 1964 ADT: 86,394

SPRING ST RAMP

Over: I-5 SB COL

1.2 N JCT I-90, King, WA

Built 1964 ADT: 14,608

5TH AVE NE

Over: I-5, I-5 EXPRESS LANES

2.2 N JCT SR 520, King, WA

Built 1964 ADT: 165,473

NE 80TH ST

Over: I-5, I-5 EXP LNS, RAMPS

0.5 N JCT SR 522, King, WA

Built 1964 ADT: 149,488

NE 92ND ST

Over: I-5

0.5 N JCT SR 522, King, WA

Built 1964 ADT: 170,579

N-85TH RAMP

Over: I-5

0.5 N JCT SR 522, King, WA

Built 1964 ADT: 149,488

N 85TH TO SB I-5

Over: I-5 SB RAMP TO NE 80TH

0.5 N JCT SR 522, King, WA

Built 1964 ADT: 8,502

I-5

Over: N-103RD EXP RAMP

5.5 N JCT I-90, King, WA

Built 1964 ADT: 3,206

I-5

Over: SBCD NE110TH ST

2.0 N JCT SR 522, King, WA

Built 1964 ADT: 46,050

NP RY

Over: STATE ROUTE 202

0.3 E JCT SR 522, King, WA

Built 1963 ADT: 39,506

I-405

Over: SR 181

6.1 N JCT SR 516, King, WA

Built 1964 ADT: 32,968

NE117TH ST

Over: I-5

2.4 N JCT SR 522, King, WA

Built 1964 ADT: 204,832

NE 130TH ST

Over: I-5

3.1 N JCT SR 522, King, WA

Built 1964 ADT: 190,254

SR 523 / NE 145TH

Over: I-5

3.8 N JCT SR 522, King, WA

Built 1964 ADT: 166,801

I-5

Over: NE 175TH ST

1.6 N JCT SR 523, King, WA

Built 1964 ADT: 166,442

I-5

Over: NE 175TH ST

1.6 N JCT SR 523, King, WA

Built 1964 ADT: 166,442

NE 185TH ST

Over: I-5

2.6 N JCT SR 523, King, WA

Built 1964 ADT: 180,670

NE 195TH ST PED

Over: I-5, RAMPS

2.6 N JCT SR 523, King, WA

Built 1964 ADT: 155,748

I-405

Over: SR 167

6.7 N JCT SR 516, King, WA

Built 1964 ADT: 91,692

I-405

Over: SR 515

6.9 N JCT SR 516, King, WA

Built 1964 ADT: 46,318

S178TH ST

Over: I-5

4.0 N JCT SR 516, King, WA

Built 1964 ADT: 224,903

KLICKITAT DR

Over: I-5

5.0 N JCT SR 516, King, WA

Built 1964 ADT: 112,452

I-5

Over: I-405 NB / SR 518 EB

0.1 N JCT I-5, King, WA

Built 1966 ADT: 36,699

I-5

Over: I-405 NB / SR 518 EB

JCT I-5, King, WA

Built 1966 ADT: 36,699

I-5

Over: E-N RAMP

1.1 E JCT SR 99, King, WA

Built 1965 ADT: 14,537

N-W RAMP

Over: I-405, E-N, S-N RAMPS

0.1 N JCT I-5, King, WA

Built 1966 ADT: 54,204

RAMP I-5 TO I-405

Over: RAMP SR 518 TO I-5

1.1 E JCT SR 99, King, WA

Built 1966 ADT: 14,537

I-405

Over: I-5

5.2 N JCT SR 516, King, WA

Built 1965 ADT: 224,903

51ST AVE S

Over: SR 518

1.0 E JCT SR 99, King, WA

Built 1966 ADT: 109,319

8TH AVE

Over: I-5

1.2 N JCT I-90, King, WA

Built 1964 ADT: 172,787

UNIV-N RAMP

Over: I-5

1.2 N JCT I-90, King, WA

Built 1965 ADT: 86,394

PIKE ST

Over: I-5

1.5 N JCT I-90, King, WA

Built 1964 ADT: 195,009

PINE ST-BOREN AVE

Over: I-5

1.6 N JCT I-90, King, WA

Built 1965 ADT: 195,009

MILITARY ROAD

Over: S-W RAMP TO S 188TH ST

3.3 N JCT SR 516, King, WA

Built 1964 ADT: 3,684

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

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 5, 2026