Posted on November 2, 2026
Decades of sediment sit on the bed of Falmouth Docks. What happens to it once dredging begins is the question an environmental researcher has now put, in detail, to the body that decides whether the work goes ahead.
Dr Tim Hughes has written to the Marine Management Organisation (MMO) with new analysis of the plans for Falmouth Docks. In his letter he argues that the application submitted by the developer cannot be used as a sound basis for licensing the project.
Campaign group Stop the Dredge has also written to the MMO, formally asking it to reopen public consultation on the licensing application. The group points to Dr Hughes’ findings, the scale of public concern since the MMO’s formal consultation closed, and its view that the local community was not given adequate initial notice of the plans as required by law.
The MMO, which is responsible for issuing dredging licences, has yet to approve the proposals.
What’s being proposed
Port operator Balaena wants to dredge 650,000 cubic metres of sediment from the docks to make way for much larger commercial vessels and cruise ships.
A separate planning application for the redevelopment and modernisation of the docks (reference PA25/01598) is with Cornwall Council. Submitted by Falmouth Docks & Engineering Company in February 2025, it covers demolition of buildings on site, partial demolition of existing wharf structures, new wharf structures, a lay-down area for floating offshore wind (FLOW) work, a temporary construction area and ancillary works.
Concerns over contaminated sediment
Dr Hughes’ analysis adds to concerns already raised by Natural England and Cornwall Wildlife Trust about the potential spread of contaminated spoil from the dredge, and the need for safeguards to protect marine life and ecosystems.
According to the campaigners, sediment in and around the proposed dredge site is known to contain extremely high concentrations of Tributyltin (TBT), a toxic chemical that is lethal to marine wildlife. They say it could also pose a risk to people if it enters the food chain or swimming areas, citing scientific research that links TBT exposure to metabolic disruption, immune system suppression, neurotoxicity, and threats to fertility and pre-natal development.
What the analysis says
Dr Hughes looked at the environmental impact statements submitted alongside the application. His letter sets out several areas where he believes they fall short.
