The Industrial & Human Heritage of Ellers Mill
From its origins in 1782 along the fast-flowing River Caldew in Dalston, Cumbria,
Ellers Mill stands proudly today as the world’s oldest active, continuously working cotton mill.
For over two centuries, through war, industrial revolutions, and devastating fires,
this remarkable site has adapted to power modern innovation while honoring Cumbrian craft.
The name “Ellers” comes from the Cumbrian dialect and Old Norse word eller, meaning alder trees.
When the original cotton spinning mill was built in 1782, the banks of the River Caldew at Buckabank in Dalston were densely lined with wild alder groves.
These resilient trees provided stabilizing timber along the riverbank and gave this iconic site its lasting name: Ellers Mill.
Flowing from Skiddaw in the Lake District, the River Caldew provided rapid, continuous water flow essential for early waterwheel engineering.
This natural hydrologic power made Dalston a focal hub for early industrial textiles, enabling Ellers Mill to outlast almost every peer from the 18th century.
The story of Ellers Mill is driven by visionary families whose leadership steered the factory through two centuries of transformation.
In 1821, Jacob Cowen acquired Ellers Mill, founding Jacob Cowen & Sons.
He transformed the spinning mill into a pioneer of surgical dressings, absorbent cotton wool, and medical wadding—laying the groundwork for modern medical textiles.
The Trimble family served as long-standing directors and key leaders, providing steady leadership through both World Wars and crucial post-war modernization.
For generations, the Coulthard family has spearheaded modern operations.
From Joseph Coulthard to George Coulthard, Michael Coulthard (ret. 1994), and current Managing Director Jonathan Coulthard, they transformed Cowens into a global non-woven specialist.
Explore the key historical epochs that shaped Ellers Mill into a living piece of industrial history.
A four-story red sandstone cotton spinning mill was constructed along the banks of the River Caldew at Buckabank in Dalston. Utilizing raw water power harnessed from the river, the mill joined Cumbria’s early textile revolution.
During the height of the Napoleonic Wars, Ellers Mill expanded its output. Along with textile processing, the water wheel powered tool forging, grain processing, and tough coarse fabrics supplied for military field equipment.
Jacob Cowen took over the site, establishing Jacob Cowen & Sons Ltd. He converted the site into a specialist absorbent cotton wool factory, creating medical wadding distributed across the Empire.
A devastating fire, caused by a lightning strike, severely damaged the original four-story mill building. Undeterred, the owners rebuilt and modernized the facility with improved fireproofing, earning the moniker “The Cotton Wool Factory”.
During WWI, Ellers Mill operated around the clock under government control. It produced hundreds of tons of purified surgical cotton wool, field dressings, and medical wadding for military hospitals across Europe.
Under the guidance of the Cowen, Trimble, and Coulthard families, the mill again served as a vital strategic asset, supplying essential medical wadding for Allied military and civilian emergency medical services.
Under Managing Director Jonathan Coulthard, Cowens transformed into an engineering leader for non-woven technical fabrics and industrial filter media.
How Ellers Mill adapted its energy sources across 240+ years to remain efficient and sustainable.
From a 100% hydro-powered waterwheel on the River Caldew in 1782, through Victorian steam boilers and 1950s post-war electrification, to modern roof-mounted solar photovoltaic energy, Ellers Mill has continuously transformed to keep Cumbrian manufacturing sustainable.
Continuous Energy Evolution
