Our mission:

To deliver environmentally friendly, sustainable and cost-effective dredging solutions

Our vision:

The creation of a carbon neutral dredging industry

Our story

How it started

Harwich Haven Authority (the Authority) developed Tiamat to reduce the environmental impact of maintenance dredging whilst being able to significantly reduce the cost. This is done by “Dredging with Nature”.

Founded in 1863, the Authority was created as a Trust Port by the UK Parliament and is responsible for the navigation safety of the five ports that make up the Harwich Haven, including the Port of Felixstowe, the UK’s largest container port where the world’s largest container vessel made its maiden call.

As part of its duties, the Authority is responsible for all dredging in the Harwich Haven and has been doing so for more than 100 years.

The Authority has been so impressed by the results of the Tiamat in the Harwich Haven, it set up Haven Dredging Ltd, to offer Tiamat to other dredging authorities, companies, ports and harbours.

Haven Dredging is using the experience and expertise the Authority has developed to provide environmentally friendly and cost-effective dredging solutions.

What we do

Haven Dredging provides an innovative solution to ports or harbours seeking new ways to manage sediment, whilst enabling a more sustainable delivery of economic, social and environmental benefits.

Launched in April 2023, Tiamat is a pioneering hydrodynamic dredging solution developed by Haven Dredging, a subsidiary of Harwich Haven Authority. By harnessing the power of the tide and currents, Tiamat transforms maintenance dredging, providing a cleaner, greener and more cost-effective alternative.

Tiamat’s distinctive modular design minimises disturbance to local sediment ecosystems by maintaining sediment within the natural system, creating an adaptable and sustainable dredging solution.

Meet the team

Jake Storey

Jake Storey

Executive Director

Jake has over 30 years’ experience in the shipping industry and is currently the CFO of the Harwich Haven Authority, as well as a NED of Ports Skills & Safety Limited and the UK’s Pilots National Pension Fund. Prior to joining the Authority, Jake was a strategic advisor to the anti-bribery business, TRACE International.

Jake started his career in the maritime industry working for Hill Samuel Merchant Bank, where he worked for and advised Wallems, Escombe Lambert, Gellaty, Lambert Brothers, Lavino Shipping and the Wescol group.

Jake has also held senior positions with Gearbulk Group as their chief risk officer and with Inchcape Shipping Services UK as chief financial officer.

He holds a MBA from Manchester Business School, and is a chartered accountant and a qualified corporate treasurer. He also has a BA Hons in History and Politics from Keele University.

Jim Warner

Jim Warner

Tiamat inventor and Construction and Dredging Manager

Jim is a subject matter expert and the inventor of the Tiamat. He has over 10 years’ experience in harbour engineering, including dredging, and is currently the Harbour Engineer for the Harwich Haven Authority. He has more than 30 years’ experience in civil engineering and construction.

Prior to joining the Authority, Jim worked at the UK’s Environment Agency as well as construction consultants, such as Atkins managing major projects. Jim holds an engineering degree from Loughborough University and is both a Chartered Construction Surveyor and a Chartered Civil Engineer.

Meet the board




Geoff has spent all his working life in service businesses. For the last 35+ years, he worked at a senior level in the health and social care system including Strategic Planning, PMI, ElderlyCare, Acute, Diagnostic and Community care. He is a specialist in creating innovative, viable and commercial solutions, and has designed and operated several successful public/private sector joint ventures.

Now semi-retired from the healthcare sector, he continues to speak at international conferences whilst managing a portfolio career as a Non-Executive Independent Chairman and Director across other service sub-sectors and charities.



Non-Executive Director

Richard was the Senior Partner of PKF (UK) LLP, the eighth largest firm of accountants in the UK. He was also a member of the Board of PKF International, the management company of the firm’s international network. He has held a number of senior positions in the accountancy profession including being a member of the Council of the Institute of Chartered Accountants in England and Wales (ICAEW) and of the Auditing Practices Board of the Financial Reporting Council.

Richard retired in March 2015 and is currently a lay member of the Court (the governing body) of the University of Dundee.


The use of the Tiamat represents an innovative approach to undertaking maintenance dredging operations in ports and harbours. The technology works with tidal processes to minimise the loss of fine sediments from the estuarine system, supporting the natural evolution of estuarine habitats such as mudflats and saltmarsh which host important populations of waterbirds and other species. The use of Tiamat avoids the need to dispose of dredged sediment at disposal sites, which are often located offshore at some distance from the location of dredging. This alternative approach to dredging therefore minimises the generation of waste material and greenhouse gas emissions associated with traditional disposal methods.

Matthew Simpson BSc MSc CBiol MRSB, Technical Director, Environment, HaskoningDHV UK

Our development partners


Whether you have a question or are ready to start your project, the Haven Dredging team is happy to help. Get in touch and we will support you with the best solution for your project.

Contact us