Our Engineers

David Littlemore has over twenty years experience in dam engineering, engineering geology and geotechnical engineering covering principally the study, planning, detailed design and supervision of remedial works of existing embankment and concrete dams. His work has also involved undertaking slope stability and seepage modelling and analyses of embankment dams, the design of flood alleviation and river enhancement schemes, pipework and valve rehabilitation, reservoir discontinuances, and earthworks operations together with all aspects of planning, design and supervision of ground investigations. David Littlemore is currently appointed to the Supervising Engineers Panel and currently undertakes the role of Supervising Engineer for 25 reservoirs throughout England and Wales for a variety of Undertakers. David formed Stillwater Associates in 2008.

 Nathan is a Chartered Civil Engineer with 15 years’ multidisciplinary and international experience in civil, marine, hydraulic, structural and dams and reservoirs engineering working as a Consultant, Client and a Contractor. He is a Supervising Engineer appointed to the Supervising Engineers Panel under the Reservoirs Act 1975. Nathan’s specialism is in reservoir safety and dams and reservoirs engineering. His experience was gained whilst working as a consultant (Arup) for 10 years on numerous reservoir remedial works schemes and then as a Dam Safety Engineering Manager for Welsh Water. In this role, Nathan was responsible for the asset management, operational surveillance and delivery of capital investment schemes to assure reservoir safety and the legal compliance of 18 large raised reservoirs under the governance of the Reservoirs Act 1975 in South West Wales. Nathan has also spent 2 years working as a Principal Engineer for a specialist civil and marine engineering contractor and in this role was responsible for carrying out engineering inspections and planning and delivering major infrastructure improvement projects in challenging environments that include reservoirs, docks and harbours, rivers and estuaries. Nathan is based in South Wales but also works out of the Reigate Office, his role within Stillwater Associates is as Principal Engineer and Supervising Engineer covering Wales, the Midlands and South West England, whilst also working nationally on the design and construction of dams and reservoir engineering projects.

Keith is a former All Reservoirs Panel Engineer and Chartered Civil Engineer with over forty years experience (thirty of them working on dams). He was a member of the All Reservoirs Panel certificated to carry out statutory inspections and to sign off safety works on large raised reservoirs. He has worked for contractors on dam construction, and consultants on design and project management of dams and ancillary works, both in the UK and overseas. Keith was Regional Reservoir Safety Manager with a major UK water company for over 10 years, with responsibility for over 200 reservoirs. He also has extensive experience in risk assessment, the risk based management of a large capital programme; leak detection in embankment dams; reservoir surveillance and instrumentation; design of dam remedial works; design of overflow works, incident management and information storage and management.

Keith is based in Warrington and his role within Stillwater is now as a technical consultant covering northern England and northern/central Wales together whilst also providing an excellent addition to our reservoir safety risk assessment capabilities.

Martin Airey is a technical specialist in dams and hydraulic engineering which has included extensive feasibility studies, detailed design and supervision of construction. He is a former member of the All Reservoirs Panel of Engineers. Martin has had overall responsibility for project delivery, technical quality and commercial performance on major projects both in the UK and overseas within the dam and reservoir engineering sector.
At Stillwater Associates Martin is now a technical consultant serving primarily the Midlands, North of England, Wales and Scotland.

Henry Hewlett has over 35 years’ experience in the study, design and project management of water supply and flood alleviation schemes, flow control structures, fluvial and tidal river works, asset management studies and reservoir safety works. Until 2016 Henry was a member of the All Reservoirs Panel of Engineers under the Reservoirs Act 1975 and has extensive experience in the design, construction and inspection of dams. He has been responsible for the management of numerous water distribution network analyses and has co-ordinated teams of architects, landscape architects, ecologists and scientists involved in the planning, design, environmental appraisal and construction of water-related schemes. He has also co-authored CIRIA reports and various technical papers on reservoir related topics. He was the Hon Technical Secretary of the British Dam Society, responsible for co-ordinating the technical affairs of the Society.

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David Brown has spent much of his career as a canal engineer, having worked for the Canal & River Trust and its predecessor the British Waterways Board since 1983. He was appointed to the Supervising Engineers’ Panel in 2000, joining BW’s Reservoir Team in 2005 and leading it from 2006 later until 2020. He continues to work part-time for the Trust as a Supervising Engineer. His appointments have included many of the canal reservoirs in England and Scotland. He takes a great interest in the history of engineering and is a member of the Institution of Civil Engineers’ Panel for Historic Engineering Works. He is a Fellow of the Institution.

Richard Smith has over thirty years experience in operation and maintenance of existing embankment dams. His work has also involved project management of reservoir safety works required under the Reservoirs Act, pipework and valve rehabilitation and reservoir discontinuances. Richard has been on the Supervising Engineers Panel since 1991 and currently undertakes the role of Supervising Engineer for 8 reservoirs in Yorkshire.

Tom has 20 years’ experience in the civil, geotechnical and environmental engineering fields with expertise in earth and concrete dam design, inspection, risk assessment, dam filter assessment, geotechnical investigation and construction supervision. Other areas of experience include flood hydrology and hydraulics geotechnical engineering and structural assessment.  Tom is an All Reservoirs Panel Engineer and over the past fifteen years has worked solely in the dam engineering field in the UK and Australia managing many large water supply, flood storage and tailings dam projects involving design, investigation, risk assessment and construction and has worked on projects in the UK, Australia, the Middle East, Europe and Africa. Tom’s wide experience in civil and geotechnical engineering has been of particular value to conceptual and feasibility studies for dam projects and for many projects he has been responsible for the full scope of large projects from site investigation through to the detailed design, tendering and construction phases.

Halil has 5 years’ experience in the civil, geotechnical and environmental engineering fields with expertise in rockfill dam design, inspection, risk assessment, dam filter assessment, geotechnical investigation and construction supervision. 

Jonathan has 25 years of experience within the reservoir safety industry joining Stillwater Associates after a long career in their reservoir safety team. 

 Frank Lawson has over thirty years experience in dam engineering, operation and maintenance of existing embankment and concrete dams. His work has also involved the design and construction of flood alleviation and river enhancement schemes, pipework and valve rehabilitation and reservoir discontinuances with Rofe Kennard and Lapworth, Yorkshire Water and then Arup. Following his retirement from the Supervising Engineers Panel Frank Lawson now undertakes reservoir safety assessments of non-statutory lakes and acts a technical reviewer of other Supervising Engineer’s work.

Alastair Elder has over 35 years’ experience in the water industry on the project management, study, promotion, procurement, design and supervision of construction of water supply, flood alleviation and river engineering, dams and reservoirs, drainage and wastewater schemes. He has coordinated multi-disciplinary teams including planners, civil and M & E engineers, architects and landscape architects, scientists and ecologists. Mr Elder has been a Technical Assessor for the Drinking Water Inspectorate and a named Reporter undertaking certification of submissions to the Water Services Regulation Authority (Ofwat) for two water companies.
He has been responsible as Director for major water and wastewater schemes; river engineering strategies and projects; water resource studies; post project appraisals; asset management planning; annual safety inspections from three major dams in Botswana; due diligence assessments; a major privatisation project in Papua New Guinea; advice to private water supply undertakers; provision of expert evidence. Particular projects have included: Testwood Lakes bankside storage scheme – environmental assessment, promotion, design and site supervision; various Environment Agency term consultancies, including assessment of effects of Jubilee Line tunnelling on R Thames flood walls and the study, design and implementation of flood defence projects; MAFF post project evaluations. Alastair has worked on projects in the UK, Africa and Asia.

Alan Rogers has worked in the UK Water Industry for 25 years and has over 18 years’ experience of project management in civils capital, and revenue maintenance, of water retaining structures; tanks, service reservoirs, water towers and earth embankment dams. Alan has been a member of the Supervising Engineers Panel under the Reservoirs Act 1975 since 2010 and has experience of supervising impounding earth embankment reservoirs and large concrete and masonry service reservoirs. Alan has extensive experience of managing, operating and maintaining embankment dams, service reservoirs and water towers from an asset owner’s perspective.

Julian Smith is a Civil Engineer and Hydrologist with wide experience of the water industry in the UK and overseas, including river modelling, flood analysis, flood alleviation works design, reservoir spillway analysis and design, water resources analysis, analysis of steady and unsteady flow in pipe networks and sewerage system modelling. He has audited water company submissions to OFWAT as well as assisting in their preparation.
Recent projects undertaken include: 1D/2D hydraulic modelling for Cogges Link road project including drafting of Proofs of Evidence and Rebuttals for CPO Public Inquiry; hydraulic analysis and design of drainage for Medmerry managed coastal defence realignment scheme; review of EA schemes including Salmons Brook scheme and WFD projects in the Sussex Ouse catchment; flood calculations and spillway assessment for more than 20 reservoirs; surface water source yield assessment for South East Water.