Longest Bridges in Washington
The longest bridge in Washington is the US 101 over Columbia R, at 2.1 miles (11,200 ft) of total structure length. The table below ranks the longest bridges in Washington by structure length.
| Bridge | County | Length | Year Built | Daily Traffic |
|---|---|---|---|---|
| US 101 over Columbia R | Pacific | 11,200 ft (2.1 mi) | 1966 | 23,300 |
| SR 520 over Lake Washington | King | 7,634 ft (1.4 mi) | 2016 | 28,957 |
| I-205 over SR 14 Bnrr | Clark | 7,434 ft (1.4 mi) | 1982 | 160,000 |
| I-5 over Denny Way-lakeview V | King | 7,077 ft (1.3 mi) | 1962 | 92,513 |
| US 2 over Ebey Island | Snohomish | 6,922 ft (1.3 mi) | 1968 | 40,591 |
| US 2 over Ebey Slough | Snohomish | 6,794 ft (1.3 mi) | 1993 | 39,593 |
| US 101 over Columbia R | Pacific | 6,650 ft (1.3 mi) | 1966 | 22,526 |
| I-5 SB over Terrain | King | 6,583 ft (1.2 mi) | 1967 | 96,609 |
| I-90 over Lake Washington | King | 6,561 ft (1.2 mi) | 1940 | 68,544 |
| SR 520 over Lake Washington | King | 6,126 ft (1.2 mi) | 2023 | 19,472 |
| NB SR 16 over Tacoma Narrows | Pierce | 5,978 ft (1.1 mi) | 1949 | 44,741 |
| SR 520 over Lake Washington | King | 5,967 ft (1.1 mi) | 2017 | 19,472 |
| I-5 NB over Terrain | King | 5,762 ft (1.1 mi) | 1966 | 96,609 |
| W.b. & Rev I-90 over Lake Washington | King | 5,736 ft (1.1 mi) | 1989 | 68,544 |
| SB SR 16 over Tacoma Narrows | Pierce | 5,569 ft (1.1 mi) | 2007 | 44,741 |
| SR 433 over Columbia R @ Longview | Cowlitz | 5,478 ft (1.0 mi) | 1929 | 20,432 |
| I-5 NB over James Cherry Revers | King | 4,724 ft (0.9 mi) | 1964 | 59,630 |
| I-5 over Lake Wash Ship Canal | King | 4,429 ft (0.8 mi) | 1962 | 90,986 |
| E Marina Way over Columbia River | Klickitat | 4,417 ft (0.8 mi) | 1924 | 14,900 |
| SR 104 Westhalf over Hood Canal | Jefferson | 3,750 ft (0.7 mi) | 1982 | 18,159 |
| US 101 over Columbia R Megler | Pacific | 3,676 ft (0.7 mi) | 1966 | 6,800 |
| I-90 over Denny Creek | King | 3,620 ft (0.7 mi) | 1981 | 18,894 |
| SR 509 over River Rr Portland AVE | Pierce | 3,583 ft (0.7 mi) | 1996 | 14,925 |
| SR 20 over Swinomish Channel | Skagit | 3,544 ft (0.7 mi) | 1981 | 18,383 |
| I-5 over Columbia River | Clark | 3,538 ft (0.7 mi) | 1916 | 65,013 |
| I-5 over Columbia River | Clark | 3,538 ft (0.7 mi) | 1958 | 65,013 |
| I-82 over Columbia River | Benton | 3,433 ft (0.7 mi) | 1988 | 12,770 |
| S Spokane ST over E Marginal Wy 1st 4th | King | 3,410 ft (0.6 mi) | 1941 | 42,350 |
| I-82 over Columbia River | Benton | 3,379 ft (0.6 mi) | 1955 | 12,770 |
| I-705 SB S-s Ramp over I-705 SB Ramp Streets+ | Pierce | 3,363 ft (0.6 mi) | 1988 | 20,205 |
| US 197 over Columbia R Sp & S Ry | Klickitat | 3,345 ft (0.6 mi) | 1954 | 6,795 |
| Spokane ST Viaduct over E Marginal Wy 1st 4th | King | 3,332 ft (0.6 mi) | 2012 | 42,350 |
| SR 20 over Swinomish Chan | Skagit | 3,258 ft (0.6 mi) | 1972 | 18,383 |
| Fauntleroy Way over Admiral Way Avalon Way | King | 3,123 ft (0.6 mi) | 1963 | 55,000 |
| SR 99 over Duwamish River | King | 3,009 ft (0.6 mi) | 1956 | 48,204 |
| W Garfield ST over Marina Pl Rr Ravine | King | 3,007 ft (0.6 mi) | 1929 | 18,000 |
| I-90 Ramp over Mercer Slough I-90 | King | 2,996 ft (0.6 mi) | 1995 | 2,421 |
| US 2 over Snohomish River | Snohomish | 2,979 ft (0.6 mi) | 1968 | 40,591 |
| SR 99 over Lake Union | King | 2,955 ft (0.6 mi) | 1931 | 61,259 |
| SR 99 over Duwamish River | King | 2,895 ft (0.5 mi) | 1996 | 46,303 |
| I-90 over City Streets | Spokane | 2,890 ft (0.5 mi) | 1967 | 51,197 |
| Spokane ST WB Lane over I-5 | King | 2,884 ft (0.5 mi) | 1967 | 13,457 |
| SR 520 over Portage Bay | King | 2,840 ft (0.5 mi) | 1963 | 18,129 |
| I-90 over Mercer Slough | King | 2,812 ft (0.5 mi) | 1940 | 74,410 |
| SR 99 over Spokane ST | King | 2,791 ft (0.5 mi) | 1959 | 18,505 |
| I-90 over Viaduct Sta 1396 US 2 | Spokane | 2,765 ft (0.5 mi) | 1967 | 51,197 |
| SR 529 over Snohomish River | Snohomish | 2,680 ft (0.5 mi) | 1927 | 16,286 |
| SR 104 East Half over Hood Canal | Kitsap | 2,669 ft (0.5 mi) | 2009 | 18,159 |
| I-90 over Mercer Sl | King | 2,668 ft (0.5 mi) | 1970 | 74,410 |
| US 101 over Chehalis River | Grays Harbor | 2,638 ft (0.5 mi) | 1955 | 26,216 |
| SR 409 over Columbia R Puget Island | Wahkiakum | 2,615 ft (0.5 mi) | 1938 | 1,973 |
| I-705 NB over I-705 NB Ramp Streets+ | Pierce | 2,587 ft (0.5 mi) | 1988 | 20,205 |
| US 97 over Columbia River | Klickitat | 2,566 ft (0.5 mi) | 1962 | 6,212 |
| 1st AVE S over Argo Rr Yard | King | 2,543 ft (0.5 mi) | 1935 | 19,000 |
| US 395 over Columbia R-riverside DR | Benton | 2,520 ft (0.5 mi) | 1954 | 34,219 |
| I-90 over Columbia River Vantage | Kittitas | 2,503 ft (0.5 mi) | 1962 | 9,077 |
| SR 397 over Columbia River | Benton | 2,502 ft (0.5 mi) | 1978 | 9,651 |
| SR 529 over Snohomish River | Snohomish | 2,464 ft (0.5 mi) | 1954 | 16,286 |
| SR 18 W-s Ramp over I-5 & SR 18 | King | 2,407 ft (0.5 mi) | 2012 | 28,117 |
| US 2 over Snohomish R Highland AVE | Snohomish | 2,369 ft (0.4 mi) | 2001 | 40,591 |
| SW Spokane ST over E Marginal Way S | King | 2,356 ft (0.4 mi) | 1983 | 10,000 |
| SR 504 over Hoffstadt Creek | Cowlitz | 2,339 ft (0.4 mi) | 1991 | 647 |
| SR 522 over Sammamish River | King | 2,334 ft (0.4 mi) | 1968 | 25,269 |
| Fifth AVE (usk) over Pend Oreille River | Pend Oreille | 2,282 ft (0.4 mi) | 1964 | 1,900 |
| I-90 over East Channel-lk Wash | King | 2,224 ft (0.4 mi) | 1981 | 66,975 |
| I-90 over East Channel-lk Wash | King | 2,224 ft (0.4 mi) | 1988 | 66,975 |
| SB I-5 To NB SR 16 over S Tacoma Way/strr/center | Pierce | 2,140 ft (0.4 mi) | 2011 | 39,113 |
| US 2 over Ebey Slough And SR 204 | Snohomish | 2,081 ft (0.4 mi) | 1968 | 39,593 |
| I-5 over Sr529 Rr Ebey Sl 60th Pl | Snohomish | 2,062 ft (0.4 mi) | 1969 | 64,989 |
| SR 261 over Snake River | Columbia | 2,040 ft (0.4 mi) | 1927 | 485 |
| US 12 over SR 107 Rr Flood Plain | Grays Harbor | 2,007 ft (0.4 mi) | 1969 | 8,382 |
| 15th AVE W over Ship Canal Rr | King | 1,998 ft (0.4 mi) | 1940 | 52,000 |
| US 12 over SR 107 Rr Flood Plain | Grays Harbor | 1,991 ft (0.4 mi) | 1969 | 8,382 |
| SR 24 over Columbia River | Benton | 1,981 ft (0.4 mi) | 1965 | 5,506 |
| US 101 over Hoquiam River | Grays Harbor | 1,979 ft (0.4 mi) | 1928 | 12,765 |
| Fox Islnd Br RD NW over Hale Passage | Pierce | 1,951 ft (0.4 mi) | 1954 | 5,525 |
| I-182 over Columbia R City Streets | Benton | 1,950 ft (0.4 mi) | 1984 | 36,943 |
| I-182 over Columbia River | Benton | 1,950 ft (0.4 mi) | 1984 | 36,943 |
| US 101 over Naselle River | Pacific | 1,937 ft (0.4 mi) | 1985 | 1,911 |
| I-90 S-e Ramp over I-90 Mercer Slough | King | 1,929 ft (0.4 mi) | 1970 | 8,091 |
| I-5 over Ebey Sl / SR 529 / Rr | Snohomish | 1,919 ft (0.4 mi) | 1954 | 64,989 |
| I-705 over 15th ST & Bnrr Prairie L | Pierce | 1,910 ft (0.4 mi) | 1986 | 26,174 |
| I-5 over Exp Galer-lakeview V | King | 1,907 ft (0.4 mi) | 1961 | 39,824 |
| I-90 over I-5 | King | 1,880 ft (0.4 mi) | 1966 | 20,960 |
| I-90 over Mercer Slough | King | 1,871 ft (0.4 mi) | 1970 | 22,361 |
| Fleshman Way over Snake River | Asotin | 1,866 ft (0.4 mi) | 1982 | 21,000 |
| SR 167 Flyover over I-405 NB SR 167 NB | King | 1,846 ft (0.3 mi) | 2018 | 5,000 |
| SR 127 over Snake R Central Ferry | Garfield | 1,831 ft (0.3 mi) | 1969 | 868 |
| Spokane ST EB Lane over I-5 | King | 1,792 ft (0.3 mi) | 1966 | 28,260 |
| US 12 over Snake R. & Bn Ry | Franklin | 1,779 ft (0.3 mi) | 1986 | 13,260 |
| SR 522 over Snohomish R & Tester RD | Snohomish | 1,779 ft (0.3 mi) | 2013 | 15,631 |
| US 12 over Snake River & Bnrr | Franklin | 1,770 ft (0.3 mi) | 1950 | 13,260 |
| N-w Ramp P1 18853 over I-5 SR 527 Broadway Av | Snohomish | 1,765 ft (0.3 mi) | 1970 | 16,700 |
| E 11th ST over City Waterway Cs2749 | Pierce | 1,748 ft (0.3 mi) | 1911 | 3,100 |
| Ramp over I-90 Ramps City Street | King | 1,742 ft (0.3 mi) | 1973 | 7,946 |
| 4th AVE S over Argo Rr Yard | King | 1,741 ft (0.3 mi) | 1933 | 28,000 |
| SR 432 over Cowlitz River & Bnsf | Cowlitz | 1,729 ft (0.3 mi) | 1973 | 19,487 |
| I-90 over Mercer Slough | King | 1,723 ft (0.3 mi) | 1970 | 31,000 |
| Maple Street over Spokane River | Spokane | 1,718 ft (0.3 mi) | 1958 | 39,775 |
| SR 303 over Port Washington Narrows | Kitsap | 1,716 ft (0.3 mi) | 1958 | 21,462 |
| SR 4 over Cowlitz R / Rr / SR 411 | Cowlitz | 1,709 ft (0.3 mi) | 1951 | 9,179 |
| NB I5 Off Ramp over W-s I5 EB W Sea Frwy | King | 1,708 ft (0.3 mi) | 1967 | 15,286 |
| I-90 over I-5 | King | 1,685 ft (0.3 mi) | 1966 | 20,960 |
| SR 522 over Snohomish R & Tester RD | Snohomish | 1,680 ft (0.3 mi) | 1963 | 15,631 |
| SR 432 over Cowlitz R & Np Ry | Cowlitz | 1,675 ft (0.3 mi) | 1961 | 19,487 |
| I-5 over Galer-lakeview V | King | 1,670 ft (0.3 mi) | 1961 | 104,978 |
| W-s Ramp over I-5 Mainline And Ramps | King | 1,664 ft (0.3 mi) | 1967 | 6,684 |
| SW Spokane ST over Delridge Way SW | King | 1,648 ft (0.3 mi) | 1983 | 98,700 |
| SR 173 over Columbia R | Douglas | 1,632 ft (0.3 mi) | 1970 | 3,767 |
| I-5 over Snohomish River Rr | Snohomish | 1,623 ft (0.3 mi) | 1968 | 64,989 |
| I-5 over Snohomish R Gn Ry | Snohomish | 1,623 ft (0.3 mi) | 1968 | 64,989 |
| SR 16 over S Tacoma Way/strr/center | Pierce | 1,608 ft (0.3 mi) | 2011 | 46,602 |
| I-5 over Puyallup River/rr/sr 167 | Pierce | 1,579 ft (0.3 mi) | 2021 | 90,829 |
| I-5 over Puyallup R/rr/sr 167 | Pierce | 1,569 ft (0.3 mi) | 2017 | 90,829 |
| SR 24 over Yakima River | Yakima | 1,564 ft (0.3 mi) | 2006 | 11,237 |
| SR 512 over Puyallup R & City Sts | Pierce | 1,558 ft (0.3 mi) | 1971 | 43,523 |
| SR 512 over Puyallup R & City Sts | Pierce | 1,555 ft (0.3 mi) | 1975 | 43,523 |
| City Street over Port Wash Narrows | Kitsap | 1,549 ft (0.3 mi) | 2011 | 6,537 |
| SR 25 over Columbia River | Stevens | 1,540 ft (0.3 mi) | 1948 | 904 |
| SW Spokane ST over Delridge Way SW | King | 1,520 ft (0.3 mi) | 1983 | 93,180 |
| W.b. I-90 over Lake Washington | King | 1,472 ft (0.3 mi) | 1989 | 68,544 |
| SR 109 Spur over Little Hoquiam River | Grays Harbor | 1,470 ft (0.3 mi) | 1985 | 500 |
| I-405 N-w Ramp over Sammamish R I-405 SR 5 | King | 1,469 ft (0.3 mi) | 1968 | 8,770 |
| Harstine Bridge RD over Pickering Passage | Mason | 1,465 ft (0.3 mi) | 1969 | 2,155 |
| US 101 N-w Ramp over US 101 | Grays Harbor | 1,456 ft (0.3 mi) | 1985 | 4,179 |
| I-705 over Chehalis Western Rr | Pierce | 1,451 ft (0.3 mi) | 1988 | 15,025 |
| SR 128 over Snake River | Asotin | 1,450 ft (0.3 mi) | 1979 | 5,160 |
| SR 18 E-n Ramp over I-5 SR 18 Ramps | King | 1,449 ft (0.3 mi) | 2012 | 15,430 |
| E-e Ramp over N-e Ramp From Front ST | King | 1,443 ft (0.3 mi) | 2003 | 11,459 |
| SR 16 over S Tacoma Way/strr/center | Pierce | 1,424 ft (0.3 mi) | 2013 | 46,602 |
| US 12 over Snake River | Asotin | 1,423 ft (0.3 mi) | 1939 | 21,000 |
| I-5 SB Off Ramp over S-e Ramp To Columbia Way | King | 1,421 ft (0.3 mi) | 1967 | 24,104 |
| I-405 over SR 522 Sammamish R | King | 1,410 ft (0.3 mi) | 1968 | 56,311 |
| US 2 over Columbia River | Chelan | 1,399 ft (0.3 mi) | 1975 | 12,899 |
| SR 4 over Deep River | Wahkiakum | 1,388 ft (0.3 mi) | 1990 | 1,509 |
| US 101 over Niawiakum River | Pacific | 1,375 ft (0.3 mi) | 1991 | 3,145 |
| I-5 over Ravenna BLVD | King | 1,372 ft (0.3 mi) | 1961 | 90,390 |
| WB I-90 over Lake Washington | King | 1,369 ft (0.3 mi) | 1989 | 68,544 |
| SR 290 over Rr Spokane River City ST | Spokane | 1,367 ft (0.3 mi) | 1984 | 7,681 |
| Overpass To T-5 over W. Marginal Wy S.w. | King | 1,362 ft (0.3 mi) | 1997 | 1,000 |
| I-405 over SR 522 Sammamish R | King | 1,352 ft (0.3 mi) | 1968 | 56,311 |
| I-5 Rev Exp Lanes over Ravenna BLVD | King | 1,349 ft (0.3 mi) | 1961 | 36,725 |
| SR 3 NB over SR 16 | Kitsap | 1,347 ft (0.3 mi) | 1988 | 11,713 |
| SW Spokane ST over Duwamish River W Waterwy | King | 1,339 ft (0.3 mi) | 1983 | 108,179 |
| I-82 over Selah Creek | Yakima | 1,336 ft (0.3 mi) | 1969 | 10,035 |
| I-82 over Selah Creek | Yakima | 1,336 ft (0.3 mi) | 1969 | 10,035 |
| E-e Ramp over I-90 Ramps Mercer Sl | King | 1,333 ft (0.3 mi) | 1993 | 1,375 |
| I-90 W-n Ramp over I-90 Wbcd | King | 1,331 ft (0.3 mi) | 1969 | 8,688 |
| I-5 over Ravenna BLVD | King | 1,325 ft (0.3 mi) | 1961 | 90,390 |
| N-n Ramp over I-5 | Snohomish | 1,323 ft (0.3 mi) | 2006 | 9,786 |
| US 2 over Ebey Slough Drainage | Snohomish | 1,317 ft (0.2 mi) | 1993 | 15,507 |
| US 97 over Ahtanum Crk Rr&n-n Ramp | Yakima | 1,314 ft (0.2 mi) | 1981 | 9,941 |
| I-5 over Lewis River | Clark | 1,310 ft (0.2 mi) | 1940 | 41,939 |
| SR 107 over Chehalis River | Grays Harbor | 1,310 ft (0.2 mi) | 1958 | 4,044 |
| SR 105 over South Bay | Grays Harbor | 1,309 ft (0.2 mi) | 1955 | 5,550 |
| N-w Ramp over I-5 | King | 1,282 ft (0.2 mi) | 1966 | 2,190 |
| I-405 NB To I-5 SB over Ramps And Swamp Creek | Snohomish | 1,270 ft (0.2 mi) | 1981 | 13,933 |
| US 395 over Columbia R Kettle Falls | Stevens | 1,267 ft (0.2 mi) | 1941 | 4,342 |
| S 196th ST over Uprr 77th AVE S Bnsfrr | King | 1,249 ft (0.2 mi) | 2000 | 11,000 |
| I-705 N-w Ramp over 15th St-plrr I-705 | Pierce | 1,246 ft (0.2 mi) | 1987 | 10,307 |
| I-90 W-s Ramp over I-5 | King | 1,245 ft (0.2 mi) | 1965 | 19,205 |
| I-705 over 15th ST Vacated Rr | Pierce | 1,245 ft (0.2 mi) | 1987 | 26,174 |
| Union Avenue South over Nprr &south Tacoma Way | Pierce | 1,234 ft (0.2 mi) | 1971 | 19,265 |
| NE 139th ST over I-5 / I-205 | Clark | 1,232 ft (0.2 mi) | 2014 | 14,913 |
| SR 305 over Agate Passage | Kitsap | 1,229 ft (0.2 mi) | 1950 | 21,431 |
| US 97 over Columbia River | Douglas | 1,227 ft (0.2 mi) | 1962 | 5,821 |
| I-90 over City Streets | King | 1,222 ft (0.2 mi) | 1991 | 11,916 |
| I-90 over Hangman Creek | Spokane | 1,222 ft (0.2 mi) | 1963 | 46,335 |
| I-90 over Hangman Creek | Spokane | 1,222 ft (0.2 mi) | 1963 | 46,335 |
| Lakeview BLVD over I-5 | King | 1,214 ft (0.2 mi) | 1963 | 7,000 |
| SR 285 over Columbia R Gn Ry | Douglas | 1,208 ft (0.2 mi) | 1950 | 26,350 |
| I-5 over E-s Ramp Br | King | 1,206 ft (0.2 mi) | 1967 | 9,404 |
| I-90 over Avalanche Relief | Kittitas | 1,206 ft (0.2 mi) | 2016 | 18,069 |
| I-90 over Avalanche Relief | Kittitas | 1,206 ft (0.2 mi) | 2016 | 18,069 |
| US 97 over Ahtanum Crk Rr & Roads | Yakima | 1,206 ft (0.2 mi) | 1981 | 9,941 |
| Grady Way over Uprr & Bnrr | King | 1,205 ft (0.2 mi) | 1986 | 26,000 |
| Woodinville-duvall over Snoqualmie River | King | 1,182 ft (0.2 mi) | 1951 | 10,564 |
| 4th AVE S over Railroad Station | King | 1,178 ft (0.2 mi) | 1910 | 13,500 |
| 4th AVE S over Parking Garage | King | 1,178 ft (0.2 mi) | 1910 | 27,000 |
| SR 509 Ramp over Railroad | Pierce | 1,169 ft (0.2 mi) | 1996 | 3,696 |
| I-90 W-n Ramp over 4th AVE And Sound Trans | King | 1,154 ft (0.2 mi) | 2010 | 11,000 |
| Lincoln AVE over E Marc ST Milwaukee Way | Pierce | 1,154 ft (0.2 mi) | 2011 | 7,100 |
| SR 18 over Npry & City Streets | King | 1,150 ft (0.2 mi) | 1956 | 41,223 |
| SR 17 over Columbia River | Douglas | 1,149 ft (0.2 mi) | 1950 | 2,645 |
| SR 504 over N Fk Toutle River | Cowlitz | 1,140 ft (0.2 mi) | 1989 | 709 |
| I-90 EB over Bus Depot Ped Path Bldns | King | 1,140 ft (0.2 mi) | 2003 | 20,960 |
| US 12 over Cowlitz R | Lewis | 1,136 ft (0.2 mi) | 1968 | 4,771 |
| Allen Street over Cowlitz R Bnrr City ST | Cowlitz | 1,115 ft (0.2 mi) | 2000 | 10,700 |
| E-n Ramp over City Street Nprr | King | 1,113 ft (0.2 mi) | 1959 | 10,336 |
| SR 122 over Tilton River | Lewis | 1,113 ft (0.2 mi) | 1961 | 757 |
| E-n Ramp SR 520 over I-405 & SR 520 | King | 1,111 ft (0.2 mi) | 1993 | 8,411 |
| I-5 over Skagit River | Skagit | 1,111 ft (0.2 mi) | 1955 | 39,245 |
| SR 9 over Snohomish River | Snohomish | 1,110 ft (0.2 mi) | 1959 | 29,011 |
| US 12 over Sylvia CR Np Ry | Grays Harbor | 1,105 ft (0.2 mi) | 1968 | 10,810 |
| Fas 1198 over Bnrr Ward Street | Lewis | 1,101 ft (0.2 mi) | 1980 | 3,841 |
| Wishkah Road over Wishkah River | Grays Harbor | 1,100 ft (0.2 mi) | 1994 | 1,167 |
| Donald Wapato Rd. over Yakima River | Yakima | 1,100 ft (0.2 mi) | 2004 | 5,000 |
| 148th St-w Ramp over I-90 Wbcd Ramp | King | 1,095 ft (0.2 mi) | 1973 | 8,050 |
| US 12 over Sylvia CR Np Ry | Grays Harbor | 1,094 ft (0.2 mi) | 1968 | 10,810 |
| SR 155 over Columbia River | Douglas | 1,088 ft (0.2 mi) | 1935 | 4,923 |