Elan Valley

The Elan Valley, located in the rugged heart of mid-Wales near Rhayader, has a long and distinctive history shaped by its landscape, its people, and eventually its pivotal role in supplying water to one of Britain’s largest cities. For centuries the valley was sparsely populated, home to small farming communities and drovers who travelled the upland routes with cattle and sheep. The area’s remoteness, coupled with its dramatic hills, moorlands, and river systems, also made it a refuge; local tradition holds that Welsh princes once sought safety in the upper Elan region during times of conflict. 

The modern history of the valley began to take shape in the late nineteenth century. By the 1890s, Birmingham was growing rapidly as an industrial centre and faced serious water shortages. City engineers identified the Elan and Claerwen river catchments as ideal sources of clean, soft upland water. In 1892, an Act of Parliament granted Birmingham Corporation permission to purchase the entire watershed—over 70 square miles, 1% of Wales—and construct a vast network of dams and aqueducts. 

Work on the Elan Valley Reservoirs became one of the great engineering undertakings of the Victorian era. Thousands of workers lived in purpose-built villages as they quarried stone, laid railway lines, and built monumental dams such as Caban Coch, Garreg Ddu, Pen y Garreg and Craig Goch. The first phase was completed in 1904, allowing gravity-fed water to travel over 70 miles to Birmingham without the need for pumping. The project not only secured a reliable water supply for millions but also transformed the landscape, flooding former farms and altering the shape of the valleys forever. 

A second phase in the mid-twentieth century culminated in the completion of the Claerwen Dam in 1952, inaugurated by Queen Elizabeth II in one of her first public duties as monarch. Today, the Elan Valley is celebrated not only for its engineering heritage but also for its rich biodiversity, protected landscapes, and continuing role in supplying high-quality drinking water. It stands as a rare example of a major industrial project that has become deeply integrated with natural conservation and public recreation.

 

People's Collection Wales

• Why do you think Birmingham needed to look so far away for clean water in the 1800s?
• What makes the Elan Valley a good place for collecting and storing water?
• How do you think life changed for the people who lived in the valley when the reservoirs were built?
• What kinds of jobs might the workers have had when building the dams?
• How does water get from the Elan Valley all the way to Birmingham without pumps?
• What wildlife do you think lives around the reservoirs and why might the area be good for animals and plants?
• How might the landscape look different today compared to before the dams were built?
• Why is it important to take care of natural places like the Elan Valley?
• If you were designing a reservoir, what features would you include to make it work well and look nice?
• How does learning about the Elan Valley help us understand where our own water comes from?

• Build a Mini Reservoir Model: Using trays, clay, stones, and water, children create a simple landscape and build a “dam” to see how reservoirs store water.
• Water Cycle in a Bag: Learners draw the water cycle, place a little water in a sealed plastic bag, and tape it to a window to observe condensation and evaporation—linking it to how the Elan Valley gathers rainwater.
• Timeline Creation In groups, pupils arrange key events (e.g., valley communities, Victorian plans, dam construction, Claerwen opening) to build a visual timeline of the Elan Valley’s history.
• Engineering Challenge: Build a Strong Dam Using classroom materials (cardboard, Lego, blocks), children design and build the strongest dam possible to withstand a small water flow.
• Mapping the Elan Valley: Provide a map outline and ask pupils to add reservoirs, rivers, and dams. Older pupils could compare historic and modern maps to see how the landscape changed.
• Debate: “Was Building the Reservoirs Fair?” Split the class into groups—farmers living in the valley, engineers, Birmingham residents—and discuss different viewpoints.
• Nature Detective Activity: Show photos of Elan Valley wildlife and have students identify habitats, food chains, and why certain species thrive there.
• Diary Entry Writing: Children write a short diary entry from the perspective of a worker building the dam, a child living in the valley, or an engineer visiting from Birmingham.
• Water Conservation Challenge: Link past to present—students create posters or pledges showing how they can save water at home and school.
• Virtual or Classroom “Tour”: Use images or a slideshow to “walk” through the dams and reservoirs. Pupils take notes and then create a brochure describing what visitors might see and learn at the Elan Valley.

(derived from the statements of what matters)

Humanities:

• Investigate
• Interpret
• Change and continuity
• Places
• Human Impact on the World
• Identity and Diversity
• Cause and effect
• Justice, inequality and rights
• Social Action
• Ethical and moral questions

Health and Wellbeing:

• Communication, Help Seeking and Empathy
• Informed Choices and the impact of decisions
• Social Influences and Norms
• Identity and Values
• Rights and Respect

Language, literacy and communication:

• Reading Strategies
• Drawing conclusions
• The effect of grammatical constructions of the meaning of texts
• Responding to texts
• Vocabulary Development
• Communicate ideas and opinions (Oral)
• Collaborate and negotiate
• Writing for different purposes and audiences