Bridge Safety in Washington

8,520 bridges — 473 Poor condition — avg age 50 years.

Bridge Inventory

Total Bridges8,520
Good Condition4,343
Fair Condition3,704
Poor Condition473
Oldest BridgeBuilt 1900
Average Age50 years

Condition Summary

% Good51.0%
% Fair43.5%
% Poor5.6%

Highest-Traffic Poor Condition Bridges in Washington

Poor condition bridges sorted by daily traffic — the most urgent safety concerns.

Bridge Condition Year Built ADT Length
LUCILE ST Poor 1966 96,847
MERCER SL Poor 1970 74,410
MERCER SLOUGH Poor 1940 74,410
LAKE WASHINGTON Poor 1989 68,544
LAKE WASHINGTON Poor 1940 68,544
S WENATCHEE AVE Poor 1973 48,107
E FORK LEWIS RIVER Poor 1939 41,939
LEWIS RIVER Poor 1940 41,939
AIRPORT WAY BAR RAMP Poor 1952 40,000
PORTAGE BAY PL E Poor 1930 36,000
PORTAGE BAY Poor 1915 35,000
LOG DUMP RD & BN RY Poor 1972 33,912
GAME CROSSING Poor 1976 33,803
UPRR Poor 1972 31,879
RAGING RIVER Poor 1975 31,252
I-5 RAMPS Poor 1961 29,145
BNSF RR Poor 1934 28,316
ARGO RR YARD Poor 1933 28,000
BNRR (NP) Poor 1959 27,805
PARKING GARAGE Poor 1910 27,000

Oldest Bridges in Washington

Bridge Condition Year Built Age ADT
OHOP CREEK Fair 1900 126 yrs 7,615
EAST DEER CR Fair 1900 126 yrs 645
LITTLE BOULDER CR Fair 1900 126 yrs 358
MAPLE CREEK Fair 1900 126 yrs 1,985
THUNDER CREEK Fair 1900 126 yrs 3,684
BLACK SLOUGH Good 1900 126 yrs 3,517
HALF BR STA 155 Fair 1900 126 yrs 1,696
WIDE HOLLOW CREEK Good 1900 126 yrs 14,180
TANWAX CR Good 1900 126 yrs 7,089
DRY RELIEF Fair 1900 126 yrs 10

Bridge Safety in Washington

Bridge condition data for Washington comes from the FHWA National Bridge Inventory. All publicly accessible bridges with a span over 20 feet are inspected at least every 24 months by certified bridge inspectors.