Archaeologists are hoping to unearth evidence of what they believe to have been one of Bronze Age Britain's largest axe-making "factories".
Clwyd-Powys Archaeological Trust (CPAT) said the axes, made from a distinctive type rock - known as picrite - had been found throughout the country.
A three-week survey at the 4,000-year-old site will start soon in Hyssington, near Welshpool, Powys.