Deeply buried in waterlogged terrain, this wedge tomb, a type of megalithic burial monument built during the late Neolithic and early Bronze Age, typically consisting of a roofed stone gallery wider and higher at one end than the other, has lost its roof entirely and now sits as an open, half-submerged gallery. That it survives at all in recognisable form is something of a quiet surprise.

The structure measures roughly 3.7 metres in overall length and about 1.15 metres in average width, making it a narrow passage even by the standards of wedge tombs. A single large stone forms the northern side of the gallery, while the eastern end is closed by two stones set one behind the other. The southern side is more complicated: three stones make up this wall, but the westernmost sits slightly outside the alignment of the others, possibly serving as a doubling stone to compensate for a side-stone that is now missing. A buttress-stone leans against it for support. The side-stones decrease in height from west to east, a characteristic feature of the wedge form. At the open western end, a prostrate stone lying flat on the ground may once have stood upright as a septal stone or door-stone, a dividing slab used to section off part of the gallery, perhaps as a symbolic threshold between the living and the dead. This reading was offered by Ruaidhrí de Valera and Seán Ó Nualláin in their 1982 survey of megalithic tombs across Counties Cork, Kerry, Limerick, and Tipperary, the most thorough cataloguing of such monuments in the southern counties.