Browse Bridge Database
8,520 bridges in the FHWA National Bridge Inventory in Washington.
National Bridge Inventory Database
Browse 8,520 bridges from the Federal Highway Administration National Bridge Inventory. Filter by state, condition rating, or search by name and location.
| Bridge | Location | Condition | Year Built | Length | ADT |
|---|---|---|---|---|---|
| SR 524 SPUR/44TH AVE W | Washington | Fair | 1963 | 74.7 m | 84,075 |
| SPRINGBROOK/OAKESDALE | Washington | Good | 2009 | 125.6 m | 83,533 |
| N-W RAMP | Washington | Good | 1965 | 75.9 m | 83,247 |
| N-W RAMP | Washington | Fair | 1966 | 63.1 m | 83,247 |
| NE 175TH ST | Washington | Good | 1964 | 49.7 m | 82,639 |
| NE 175TH ST | Washington | Good | 1964 | 49.7 m | 82,639 |
| NE 85TH ST | Washington | Good | 1971 | 68.0 m | 80,423 |
| NE 85TH ST | Washington | Good | 1971 | 66.8 m | 80,423 |
| ABANDONED RR | Washington | Fair | 1967 | 82.6 m | 78,048 |
| ABANDONED RR | Washington | Good | 1967 | 79.2 m | 78,048 |
| I-405 & RAMPS | Washington | Good | 1964 | 83.5 m | 77,502 |
| SR 104 / NE 205TH ST | Washington | Good | 1963 | 57.3 m | 77,329 |
| SR 104 / NE 205TH ST | Washington | Good | 1963 | 61.0 m | 77,329 |
| RR & CITY STREETS | Washington | Fair | 1965 | 233.2 m | 77,251 |
| SR 181 | Washington | Fair | 1964 | 52.7 m | 77,251 |
| GREEN RIVER | Washington | Fair | 1964 | 74.7 m | 77,251 |
| FALLOUT SHELTER | Washington | Good | 1963 | 17.4 m | 76,058 |
| MAY CREEK | Washington | Good | 1958 | 51.5 m | 74,980 |
| MAY CREEK | Washington | Good | 2023 | 50.6 m | 74,980 |
| MERCER SLOUGH | Washington | Poor | 1940 | 857.1 m | 74,410 |
| MERCER SL | Washington | Poor | 1970 | 813.5 m | 74,410 |
| I-705 SR 7 RAMPS RR | Washington | Good | 2016 | 218.8 m | 74,394 |
| I-705 SR 7 RAMPS RR | Washington | Fair | 1964 | 249.0 m | 74,394 |
| I-705 SR 7 RAMPS RR | Washington | Fair | 1964 | 249.0 m | 74,394 |
| I-405 | Washington | Good | 2023 | 36.4 m | 73,753 |
| COAL CREEK PARKWAY SE | Washington | Fair | 1965 | 68.3 m | 71,797 |
| COAL CREEK PARKWAY SE | Washington | Fair | 1965 | 60.0 m | 71,797 |
| UNION AVE | Washington | Good | 1972 | 70.4 m | 71,543 |
| CEDAR ST | Washington | Good | 1972 | 60.7 m | 71,543 |
| UNION AVE | Washington | Good | 1972 | 70.4 m | 71,543 |
| CEDAR ST | Washington | Fair | 1972 | 60.7 m | 71,543 |
| SB VIADUCT STA 2195 | Washington | Fair | 1964 | 246.0 m | 71,171 |
| DEARBORN ST | Washington | Fair | 1965 | 66.8 m | 71,171 |
| KING-JACKSON ST | Washington | Fair | 1965 | 217.0 m | 71,171 |
| DEARBORN ST | Washington | Good | 1965 | 66.8 m | 71,171 |
| KING-JACKSON ST | Washington | Fair | 1965 | 215.2 m | 71,171 |
| NE 44TH ST | Washington | Good | 2023 | 40.7 m | 70,736 |
| SR 18 | Washington | Fair | 1959 | 64.9 m | 70,133 |
| SR 18 | Washington | Fair | 1959 | 62.8 m | 70,133 |
| RICHARDS RD | Washington | Good | 1968 | 65.2 m | 69,741 |
| RICHARDS RD | Washington | Fair | 1940 | 61.0 m | 69,741 |
| OWR N RR | Washington | Fair | 1957 | 19.2 m | 69,477 |
| HENDERSON BLVD | Washington | Good | 1957 | 26.5 m | 69,477 |
| S 405 & N 525 RAMPS | Washington | Fair | 1980 | 83.8 m | 69,203 |
| NE 132ND ST | Washington | Fair | 1970 | 54.9 m | 69,115 |
| NE 132ND ST | Washington | Fair | 1970 | 51.2 m | 69,115 |
| I-405 | Washington | Good | 2024 | 32.2 m | 68,675 |
| LAKE WASHINGTON | Washington | Fair | 1989 | 417.3 m | 68,544 |
| LAKE WASHINGTON | Washington | Poor | 1989 | 1,748.6 m | 68,544 |
| LAKE WASHINGTON | Washington | Fair | 1989 | 448.7 m | 68,544 |
Frequently Asked Questions
The National Bridge Inventory (NBI) is a federal database maintained by the Federal Highway Administration containing inspection data for all bridges on public roads in the U.S. with a span of more than 20 feet. Bridge owners must inspect each structure at least every 24 months.
ADT stands for Average Daily Traffic — the average number of vehicles crossing the bridge per day. Bridges are sorted by ADT by default because high-traffic bridges in poor condition pose the greatest risk to the most people.
Yes. Use the search field above to find bridges by name, location, or features crossed. You can also combine the search with state and condition filters to narrow your results.