Nineteen such structures were identified during field survey of the bog, each one a low, carefully laid construction of brushwood and roundwood, the kind of material that would vanish within a generation above ground but can survive for two and a half millennia when sealed in wet peat.

The platforms were not all built to the same specification. Most combined brushwood with roundwood timbers, but in at least two cases the builders went further, weaving the brushwood rather than simply laying it flat, a technique that would have added stability to the surface. In three instances, small anchoring pegs were driven in to hold the structure in place against the movement of the bog. Wood species identified at nine of the sites included alder, ash, birch, hazel, and willow, all native species that would have grown close to the bog's edge and been readily available. Radiocarbon dating of four platforms produced dates ranging from 792 to 526 BC in the Late Bronze Age through to 351 to 120 BC in the Iron Age, suggesting that the bog was revisited and used across several centuries. Wetland platforms of this kind are generally understood to have served a variety of purposes, from fishing and fowling to the storage or deposition of goods, though the specific function of any individual structure is rarely easy to determine from the physical remains alone.