Total Bridges
8,808
Public highway bridges in Washington
State profile · Below national median SD
Washington bridge safety
Condition ratings, load ratings, and structural-deficiency data for every public highway bridge in Washington — drawn straight from the FHWA National Bridge Inventory.
- 8,808
- Public bridges
- 42.4%
- Good condition
- 4.8%
- Poor condition
- 4.8%
- Structurally deficient
Good Condition
42.4%
3,734 bridges rated 7-9
-7.6pp vs 50% benchmark
Poor Condition
4.8%
424 bridges rated 0-4
Structurally Deficient
4.8%
424 bridges flagged for repair priority
-2.2pp vs national avg 7.0%
Washington vs national bridge condition
Washington — Good condition share 42.4%
National avg
Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).
Washington — Structurally deficient share 16.0%
National avg
Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.
Condition Distribution
Bridge inventory deck-condition mix — Washington (FHWA NBI)
Counties (39)
Adams 190 Asotin 29 Benton 173 Chelan 154 Clallam 152 Clark 228 Columbia 86 Cowlitz 167 Douglas 40 Ferry 54 Franklin 138 Garfield 54 Grant 314 Grays Harbor 365 Island 8 Jefferson 100 King 1364 Kitsap 119 Kittitas 311 Klickitat 91 Lewis 422 Lincoln 181 Mason 139 Okanogan 163 Pacific 120 Pend Oreille 72 Pierce 502 San Juan 13 Skagit 256 Skamania 120 Snohomish 516 Spokane 360 Stevens 81 Thurston 216 Wahkiakum 36 Walla Walla 200 Whatcom 358 Whitman 351 Yakima 565
Washington vs nearby ranks
Adjacent states on the structurally deficient leaderboard (lower share = better)
States are ranked by share of bridges flagged structurally deficient — the FHWA classification for any span where deck, superstructure, or substructure carries a condition rating of 4 or below. Lower percentages indicate stronger maintenance funding and inspection follow-through. States here sit immediately above and below Washington on the same metric.
06
California
4.60% top marginal rate
05
Arkansas
4.71% top marginal rate
53
Washington
4.81% top marginal rate
18
Indiana
4.94% top marginal rate
20
Kansas
5.25% top marginal rate
Bridges Needing Most Attention in Washington
Six lowest-condition bridges in Washington, ranked by composite NBI rating. Each is inspected at least every 24 months.
SILVER CK RD 00670
Structurally DeficientOver: NINE MILE CREEK
19.05 E SR 21, Ferry, WA
Built 1958 Load: 2.7 t ADT: 47
4TH ST
PoorOver: MILL CREEK
4TH AND MILL CR, Walla Walla, WA
Built 1908 Load: 2.7 t ADT: 2,624
NO DATA ENTERED
Structurally DeficientOver: WEST BRANCH LECLERC CREE
NO DATA ENTERED, Pend Oreille, WA
Built 1954 Load: 3.5 t ADT: 5
STEVENS RD. -IRRIG
PoorOver: DRAIN
00.26 NO CHAMBERS, Yakima, WA
Built 1965 Load: 3.6 t ADT: 68
PEARL HILL RD
PoorOver: JORDAN CREEK
1.44 E JCT HILAND ORCH RD, Douglas, WA
Built 1953 Load: 4.2 t ADT: 72
FARM ACCESS
PoorOver: ROZA ID WASTEWAY NO 3
NR PARKER HEIGHTS, WA, Yakima, WA
Built 1955 Load: 4.4 t ADT: 10
All Bridges in Washington
SR 18
UnknownOver: SR 516
4.1 E JCT SR 515, King, WA
Built 1997 ADT: 26,572
SR 519
UnknownOver: STADIUM,BNSFRR,4TH AVE
0.2 W JCT I-90, King, WA
Built 2002 ADT: 12,840
S-E RAMP
UnknownOver: 4TH AVENUE
0.2 W JCT I-90, King, WA
Built 2003 ADT: 6,420
256TH ST
UnknownOver: SR 18
1.5 E JCT SR 516, King, WA
Built 2002 ADT: 33,566
E-E RAMP
UnknownOver: N-E RAMP FROM FRONT ST
2.1 E JCT SR 900, King, WA
Built 2003 ADT: 5,668
HIGHLANDS DR
UnknownOver: I-90, E FK ISSAQUAH CR
2.1 E JCT SR 900, King, WA
Built 2003 ADT: 59,685
E-N RAMP
UnknownOver: I-90, HIGHLANDS DR
2.1 E JCT SR 900, King, WA
Built 2003 ADT: 59,685
S-S RAMP
UnknownOver: SR 167, RAMP
JCT I-405, King, WA
Built 2002 ADT: 91,692
PED/EMRGNCY ACCESS
UnknownOver: I-405
4.0 N JCT SR 520, King, WA
Built 2002 ADT: 186,135
N-E RAMP
UnknownOver: SE 8TH ST
1.7 N JCT I-90, King, WA
Built 2003 ADT: 19,658
NE 8TH ST
UnknownOver: I-405
2.7 N JCT I-90, King, WA
Built 2003 ADT: 162,591
NE 4TH ST
UnknownOver: I-405
2.4 N JCT I-90, King, WA
Built 2003 ADT: 144,832
RAMP
UnknownOver: COLLECTOR DISTRIBUTOR
2.4 N JCT I-90, King, WA
Built 2004 ADT: 16,919
SBCD RAMP
UnknownOver: COLLECTOR DISTRIBUTOR
2.4 N JCT I-90, King, WA
Built 2004 ADT: 16,919
NE 6TH ST
UnknownOver: 114TH AVE NE, I-405
2.6 N JCT I-90, King, WA
Built 2004 ADT: 72,416
GALER ST PED
UnknownOver: SR 99/AURORA AVE N
6.9 N JCT SR 509, King, WA
Built 2004 ADT: 50,006
SR 18
UnknownOver: SR 169,MAXWELL,TAYLOR CR
3.8 N JCT SR 516, King, WA
Built 2005 ADT: 21,491
SR 18
UnknownOver: SR 169,MAXWELL,TAYLOR CR
3.8 N JCT SR 516, King, WA
Built 2004 ADT: 21,491
SE 200TH
UnknownOver: SR 18
2.1 E JCT SR 169, King, WA
Built 2004 ADT: 30,286
S 317TH ST
UnknownOver: SB I-5, RAMP
2.0 N JCT SR 18, King, WA
Built 2006 ADT: 79,345
NE 128TH ST
UnknownOver: SB I-405
5.7 N JCT SR 520, King, WA
Built 2006 ADT: 63,798
NE 128TH ST
UnknownOver: NB I-405
5.7 N JCT SR 520, King, WA
Built 2006 ADT: 63,798
W-W RAMP
UnknownOver: SR 202 BNRR
7.7 E JCT SR 522, King, WA
Built 2007 ADT: 35,875
I-405
UnknownOver: I-90
JCT I-405, King, WA
Built 2008 ADT: 63,576
NE 10TH STREET
UnknownOver: I-405
2.9 N JCT I-90, King, WA
Built 2009 ADT: 162,591
I-90 W-N RAMP
UnknownOver: 4TH AVE AND SOUND TRANS
0.4 W JCT I-5, King, WA
Built 2010 ADT: 12,840
BENSON ROAD
UnknownOver: I-405
0.1 N JCT SR 515, King, WA
Built 2010 ADT: 91,263
SR 520 W-N RAMP
UnknownOver: SAMMAMISH PKWY/RIVER
4.9 E JCT I-405, King, WA
Built 2010 ADT: 38,940
SR 520 N-E RAMP
UnknownOver: W L SAMMAMISH PKWY/RIVER
4.9 E JCT I-405, King, WA
Built 2010 ADT: 38,940
NE 12 ST
UnknownOver: I-405
3.0 N JCT I-90, King, WA
Built 2011 ADT: 162,591
N-E RAMP
UnknownOver: CD RAMP AND TERRAIN
2.8 N JCT I-90, King, WA
Built 2011 ADT: 9,639
I-405-SR 520 NBCD
UnknownOver: I-405 N-E & N-W RAMPS
3.1 N JCT I-90, King, WA
Built 2011 ADT: 32,129
PEDESTRIAN XING
UnknownOver: US 2
23.8 E SNOHOMISH CO, King, WA
Built 2010 ADT: 4,584
SR 18 E-N RAMP
UnknownOver: I-5, SR 18, RAMPS
JCT I-5, King, WA
Built 2012 ADT: 66,885
SR 18 W-S RAMP
UnknownOver: I-5 & SR 18
JCT I-5, King, WA
Built 2012 ADT: 66,885
SR 520
UnknownOver: 108TH AVE NE
5.2 E JCT SR 513, King, WA
Built 2013 ADT: 15,083
BELLEVUE WAY NE
UnknownOver: SR 520
4.9 E JCT SR 513, King, WA
Built 2014 ADT: 52,112
PEDESTRIAN TRAIL
UnknownOver: N-E RAMP
4.1 E JCT SR 513, King, WA
Built 2014 ADT: 4,258
N-W RAMP
UnknownOver: I-405 N-E RAMP
7.9 N JCT SR 520, King, WA
Built 2015 ADT: 23,472
COLORADO AVE
UnknownOver: SR 99
3.9 N JCT SR 509, King, WA
Built 2013 ADT: 19,818
SR 99
UnknownOver: SR 99 NB, SR 99 NB/RAMP
5.5 N JCT SR 509, King, WA
Built 2015 ADT: 19,818
SR 99
UnknownOver: MERCER ST
5.7 N JCT SR 509, King, WA
Built 2015 ADT: 27,602
SR 167 SB HOV
UnknownOver: SR 18
2.3 E JCT I-5, King, WA
Built 2016 ADT: 57,729
N-N RAMP
UnknownOver: SR 515
6.9 N JCT SR 516, King, WA
Built 2017 ADT: 46,318
S-S RAMP
UnknownOver: SR 515
6.9 N JCT SR 516, King, WA
Built 2017 ADT: 46,318
SR 167 FLYOVER
UnknownOver: I-405 NB, SR 167 NB
6.5 N JCT SR 516, King, WA
Built 2018 ADT: 63,355
PEDESTRAIN TRAIL
UnknownOver: SR 520
0.3 E JCT SR 513, King, WA
Built 2023 ADT: 37,919
PEDESTRIAN TRAIL
UnknownOver: I-405 SOUTHBOUND
1.1 N JCT I-90, King, WA
Built 2023 ADT: 94,000
MAIN ST
UnknownOver: I-405
2.2 N JCT I-90, King, WA
Built 2023 ADT: 190,241
INTERURBAN TRAIL
UnknownOver: AURORA AVE/SR 99
0.6 N JCT SR 523, King, WA
Built 2009 ADT: 29,570
Showing 551-600 of 8,808 bridges
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges Editorial.
Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the FHWA National Bridge Inventory (NBI). A "structurally deficient" rating is a repair-priority signal, not a closure or unsafe-to-cross designation. Consult a qualified civil engineer before making decisions based on this data.
Understanding Bridge Conditions
How FHWA rates bridge condition on a 0-9 scale.
Check Your Daily Bridges
How to look up bridge condition data for bridges on your route.
Read our methodology — how this data is sourced, computed, and verified.
| Publisher | Kiznis Studio |
| Sources | FHWA National Bridge Inventory, public U.S. government datasets |