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Bridge Washing in Unincorporated King County
Crews use different washing tools to meet the needs of each bridge and comply with Washington Department of Ecology and Washington Department of Fish and Wildlife Permits. Here, crews used a hand-held washer cleaning the lower levels of the Green River Gorge Bridge located to the west of Black Diamond, WA in 2019. After dry cleaning, crews wash with the minimum water pressure necessary to accomplish the work and prevent the removal of existing paint and subsequent discharge to waters of the state.
Overview
Bridges must be regularly cleaned to extend their useful life and ensure they perform safely. Bridges can become dirty from sand, dirt, gravel, pollution, and anti-icing chemicals, which can fade paint and eat away at steel.
Before and after photos of a 2018 bridge washing project on Flaming Geyser Bridge No. 3024 located north of Enumclaw, WA. View larger image (2MB)
Bridges to be washed in 2026
These bridges will be cleaned by King County in 2026, as a part of preventative maintenance efforts.
Tolt Bridge No. 1834A
Tolt Bridge on Google Maps | Area Map for Tolt Bridge (327KB)
Flaming Geyser Bridge No. 3024
Flaming Geyser Bridge on Google Maps | Area Map for Flaming Geyser Bridge (291KB)
Green River Gorge Bridge No. 3032
Green River Gorge Bridge on Google Maps | Area Map for Green River Gorge Bridge (246KB)
W Snoqualmie Bridge No. 228A
W Snoqualmie Bridge No. 228A on Google Maps| Area Map for W Snoqualmie Bridge No. 228A (192KB)
W Snoqualmie Bridge No. 916A
W Snoqualmie Bridge No. 916A on Google Maps | Area Map for W Snoqualmie Bridge No. 916A (262KB)
Cedar Grove Bridge No. 3164
Cedar Grove Bridge No. 3164 on Google Maps | Area Map for Cedar Grove Bridge No. 3164 (375KB)
Cedar Mountain Bridge No. 3165
Cedar Mountain Bridge No. 3165 on Google Maps | Area Map for Cedar Mountain Bridge No. 3165 (271KB)
Kelly Road Bridge No. 5008
Kelly Road Bridge No. 5008 on Google Maps | Area Map for Kelly Road Bridge No. 5008 (177KB)
Raging River Bridge No. 1008E
Raging River Bridge No. 1008E on Google Maps | Area Map for Raging River Bridge No. 1008E (229KB)
Judd Creek Bridge No. 3184
Judd Creek Bridge No. 3184 on Google Maps | Area Map on Judd Creek Bridge No. 3184 (292KB)
Tukwila Urban Center Pedestrian Bridge No. TUKxPx25
Tukwila Urban Center Pedestrian Bridge No. TUKxPx25 on Google Maps | Area Map for Tukwila Urban Center Pedestrian Bridge No. TUKxPx25 (3.2MB)
Fort Dent Trail Bridge No. TUKxPx22
Fort Dent Trail Bridge No. TUKxPx22 on Google Maps | Area Map for Fort Dent Trail Bridge No. TUKxPx22 (4.11MB)
Fort Dent Park Bridge No. TUKxNx21
Fort Dent Park Bridge No. TUKxNx21 on Google Maps | Area Map for Fort Dent Park Bridge No. TUKxNx21 (3.2MB)
SC Blvd, Green River Bridge No. TUKxNx05
SC Blvd, Green River Bridge No. TUKxNx05 on Google Maps | Area Map for SC Blvd, Green River Bridge No. TUKxNx05 (7.38MB)
Interurban Trail Bridge No. TUKxPx19
Interurban Trail Bridge No. TUKxPx19 on Google Maps | Area Map on Interurban Trail Bridge No. TUKxPx19 (7.22MB)
Col Joe M Jackson Bridge No. KENT-09
Col Joe M Jackson Bridge No. KENT-09 on Google Maps | Area Map for Col Joe M Jackson Bridge No. KENT-09 (5.29MB)
List of 2026 bridge washing details
| Roadway | Milepost | Latitude | Longitude | Waterbody Crossing | Scheduled Activity | Anticipated Timeframe | Approximate Duration | Traffic Impacts | Type |
| NE Tolt Hill Road | 0.5 | 47.637939 | -121.930275 | Snoqualmie River | Steel Truss | Q1 2026 | 4 days | One lane closure | Steel |
| 228th Place SE | 0.19 | 47.278751 | -122.039398 | Green River | Deck and Towers | Q1 2026 | 2 days | One lane closure | Steel |
| SE Green River Gorge Road | 2.99 | 47.301189 | -121.950745 | Green River | Steel Lower Chord | Q1 2026 | 3 days | Full closure | Steel |
| W Snoqualmie River Road NE | 1.26 | 47.622231 | -121.934799 | Drainage Ditch | Deck and Rail | Q1 2026 | 1/2 day | One lane closure | Concrete |
| W Snoqualmie River Road NE | 0.93 | 47.626808 | -121.935303 | Slough | Deck and Rail | Q1 2026 | 1/2 day | One lane closure | Concrete |
| Cedar Grove Road SE | NA | 47.439774 | -122.064262 | Cedar River | Deck and Rail | Q2 2026 | 1/2 day | One lane closure | Concrete |
| SE Jones Road | 3.6 | 47.458160 | -122.079079 | Cedar River | Deck and Rail | Q2 2026 | 1/2 day | One lane closure | Concrete |
| Kelly Road NE | NA | 47.743137 | -121.906166 | Cherry Creek | Deck and Rail | Q2 2026 | 1/2 day | One lane closure | Concrete |
| SE 68th Street | 0.05 | 47.539921 | -121.908630 | Raging River | Rail and Arch | Q2 2026 | 1/2 day | One lane closure | Concrete |
| Vashon Hwy SW | 5.7 | 47.401917 | -122.465889 | Judd Creek | Deck and Rail | Q2 2026 | 1 day | One lane closure | Concrete |
| Southcenter Blvd | 0.8 | 47.463634 | -122.248779 | Green River | Deck, Rail, Abutment | Q2 2026 | 1 day | One lane closure | Concrete |
| Interurban Trail | NA - Trail | 47.465611 | -122.247475 | Green River | Deck and Rail | Q2 2026 | 1/2 day | Full closure | Concrete |
| Starfire Way | 0.1 | 47.468025 | -122.248947 | Green River | Deck and Rail | Q2 2026 | 1/2 day | One lane closure | Concrete |
| Fort Dent Trail | NA - Trail | 47.473778 | -122.251999 | Duwamish River | Deck and Steel Truss | Q2 2026 | 1/2 day | Full closure | Steel |
| Green River Trail | NA - Trail | 47.459278 | -122.245888 | Green River | Deck and Steel Tied Arch | Q2 2026 | 1 day | Full closure | Steel |
| Veterans Drive | 2.0 | 47.395889 | -122.274223 | Green River | Full Bridge | Q2 2026 | 2 days | One lane closure | Steel |
View PDF of list (45KB)