Tryweryn flooding

Tryweryn flooding
Name	Tryweryn Valley / Llyn Celyn Reservoir
Native name	Tryweryn
Country	United Kingdom
Constituent country	Wales
County	Gwynedd
Coordinates	52°58′N 3°39′W
Status	Flooded valley / reservoir
Created	1965–1967
Submerged	Capel Celyn, Tryweryn Valley

Tryweryn flooding The Tryweryn flooding was the inundation of the Tryweryn Valley to create Llyn Celyn reservoir, involving the submergence of the Welsh-speaking hamlet Capel Celyn and surrounding farms to supply water to Liverpool. The project provoked a national controversy linking figures such as David Lloyd George, institutions such as the Liverpool Corporation, political parties like Plaid Cymru and the Labour Party, and events including debates in the Westminster Parliament. Its repercussions influenced later campaigns involving devolution and the rise of movements represented by Cymru Fydd, Sinn Féin, and cultural activism across Cardiff, Bangor University, and Aberystwyth.

Background and context

The valley lay within Merionethshire (later Gwynedd) near the confluence of the Afon Tryweryn and Afon Dee, accessible via routes connecting to Bala and Pooch; it included the isolated community of Capel Celyn and hamlets linked to parishes such as Llanbeblig and Llanwnda. Industrial and municipal water demands from Liverpool Corporation Waterworks were framed by postwar urban expansion tied to Liverpool, Manchester, and ports like Birkenhead; planners consulted engineers from Sir Robert McAlpine, Mott, Hay and Anderson, and agencies including the Ministry of Housing and Local Government and the Water Resources Board. The project sat against a backdrop of cultural revival associated with Eisteddfod, literary revivalists such as T. H. Parry-Williams, and political figures like Gwynfor Evans and Aneurin Bevan.

Planning and construction of the reservoir

From Parliamentary Acts promoted by Liverpool Corporation and approved by ministers including those from the Home Office and influenced by civil servants in Whitehall, plans were drafted by consulting firms and contractors, referencing precedent reservoirs at Kielder Water, Harrison Reservoir, and schemes involving engineers such as John Smeaton and firms akin to Sir Robert McAlpine. Parliamentary approval proceeded under debates in the House of Commons of the United Kingdom and the House of Lords, drawing interventions from MPs representing constituencies like Ceredigion, Caernarvonshire, and urban seats in Liverpool Exchange. Construction required compulsory purchase orders administered through agencies like Her Majesty's Treasury and legal advice from chambers such as Middle Temple; contractors mobilised heavy machinery and techniques used previously at Bala Lake rehabilitation and dam works at Rheidol.

Flooding of Capel Celyn and immediate impact

The inundation, carried out in the mid-1960s, saw the dismantling of Capel Celyn chapel, homes, farms, and burial grounds, displacing residents with ties to institutions such as St Mary's Church, Bala and local cooperatives. Evacuations involved local authorities including Gwynedd Council predecessors and charities like The Salvation Army offering assistance; media coverage appeared in outlets such as the BBC, The Guardian, The Times, and regional papers in Wrexham and Colwyn Bay. Local leaders including elders, farmers, and councillors appealed to national politicians like Harold Wilson and MPs from Liverpool delegations, while protests and petitions referenced legal remedies pursued through courts such as the High Court of Justice and appeals to ministers including the Secretary of State for Wales.

Political and legal repercussions

The episode catalysed political mobilisation around Welsh national identity, galvanising Plaid Cymru leadership under Gwynfor Evans and provoking criticism from MPs in Cardiff and Swansea. It altered discourse in the Welsh Office and influenced statutory changes considered by bodies like the Local Government Act 1972 drafters and later the Welsh Language Act 1993 and Government of Wales Act 1998. Legal debates engaged solicitors and barristers from chambers dealing with compulsory purchase and parliamentary powers, and reinvigorated campaigns that fed into the formation of institutions including the National Assembly for Wales and later Senedd Cymru. International commentators linked the case to minority rights issues discussed in forums such as the United Nations and to nationalist movements including Basque Nationalist Party parallels and the campaign histories of Scottish National Party figures.

Cultural and social legacy

Culturally the loss became emblematic in Welsh literature, music, and visual arts: poets such as Dylan Thomas were invoked alongside contemporary bards at the National Eisteddfod of Wales; musicians and bands from Cardiff and Bangor wrote protest songs; playwrights in companies like Theatr Genedlaethol Cymru dramatized events; and painters exhibited work in venues such as the National Museum Cardiff and galleries in Conwy. Activists connected the episode to later direct actions by groups inspired by CND tactics, and to campaigns by trade unions including the Transport and General Workers' Union and cultural organisations like Urdd Gobaith Cymru. Academics at Bangor University, Aberystwyth University, and Cardiff University produced studies cited in policy debates and curricula used in schools overseen by local education authorities in Gwynedd.

Commemoration and memorials

Commemorative responses included plaques and memorials erected by community groups, heritage bodies such as Cadw, and cultural institutions including the National Library of Wales. Annual events at sites near Bala draw descendants and activists, with exhibitions curated by museums like St Fagans National Museum of History and archives held at the National Archives (United Kingdom). Monuments and oral-history projects have involved local councils, heritage trusts, and NGOs including Amgueddfa Cymru, with scholarly conferences at universities and panels featuring figures from Welsh politics, culture, and law.

Category:History of Wales Category:Reservoirs in Gwynedd