This monument threatened with disappearance was excavated by J. Lecornec in 1969.
Located in a field called "Stang er Arheu", it is part of the large moor limited to the north by the wood of Treulan, to the east by the Kerivallain stream and the farm of Lost er Lenn, to the south by the pond from Kermainguy.
The burial is located in a mound 8.40 m in diameter, this mound is a simple cairn obtained by piling up stones around the central burial place.
Nine supports constitute the walls of the chamber.
The C2 support is a magnificent contemporary stele of the dolmen.