Energy · 619 CE

Tide mill

A pond fills at high tide and drives a mill wheel on the ebb.

The Nendrum monastic tide mill in Northern Ireland is tree-ring dated to 619 CE. Tide mills gave coastal towns a predictable power source independent of rainfall, and they are the ancestors of modern tidal barrages.

See it in the living tree Wikipedia

Arcs above join it to what it stood on, arcs below to what it led to. The bar places this stretch on the tree's whole timeline.

What it built on 1

Watermill 300 BCE

What it led to 1

Tidal barrage 1966

Related measurements

The dashed line marks when it first worked.

Energy sources in England & Wales since 1800 Latest: 99.9 % of primary energy (2008) Source: Our World in Data