Record #00376Transport archive
Longest Floating Bridge
Washington state's SR 520 Evergreen Point Floating Bridge has a 2,349.55-metre pontoon-supported section, the world's longest floating bridge, and opened to traffic in April 2016.
ARCHIVE VISUAL / 01
NOT TO SCALE
Current Record
2,349.55m
Current record value
- Location
- Lake Washington, Washington State, USA · Medina, Washington · Seattle · United States
- Start date
- 2016-04
- Record status
- VerifiedView verification details ↗Report an issue
Overview
Archive NoteThe bridge crosses Lake Washington between Seattle and the Bellevue area. Water depth and soft sediments make traditional foundation-supported spans difficult here.
The new structure uses 77 pontoons secured with anchor systems and was constructed from 2012 to 2016. Washington State DOT notes that its predecessor had held the same record before replacement.
Record history
1 Milestones- 2,349.55 mSR 520 Evergreen Point Floating BridgeLake Washington, Washington State, USACurrent Record
Sources
Evidence & ReferencesVerification basis and limitations
VerifiedThe record conclusion has sufficient verification support.
Basis: direct confirmation by an authority
Record authority and the relevant government or operator explicitly support the comparison, with dates and measurement scopes checked.
- Verification assessment
- 2026-11-05
- Last editorial review
- 2026-11-05
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