Overview
- Local authorities in early August 2026 closed parts of the Neuer Hafen in Bremerhaven and temporarily altered ferry routes after inspections found unsafe wooden quay structures and a settled Nordmole.
- The Bremer environmental office says about eight kilometers of wooden pile revetments in the Übersee‑ and Fischereihafen have shown infestation by ship‑borers since the 2010s, with damage appearing in pulses rather than evenly spread.
- Teredo navalis bores from the inside and often seals its entry holes, so timber can lose load‑bearing wood before surface damage is visible, which explains sudden failures of piers, bridges, and a historic crane.
- The Thünen‑Institut is running multi‑year trials of six wood types and treatments and plans genetic monitoring; early results show tropical hardwoods and acetylated wood resist attack better than untreated pine.
- Park and port authorities say open‑sea eradication is infeasible, so mitigation focuses on sealing, treated wood, or replacing timber with steel and concrete, with single projects estimated in the tens of millions of euros and repairs taking years.