Bridge Safety in Washington
8,520 bridges — 473 Poor condition — avg age 50 years.
Bridge Inventory
| Total Bridges | 8,520 |
| Good Condition | 4,343 |
| Fair Condition | 3,704 |
| Poor Condition | 473 |
| Oldest Bridge | Built 1900 |
| Average Age | 50 years |
Condition Summary
| % Good | 51.0% |
| % Fair | 43.5% |
| % Poor | 5.6% |
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.