That kind of preservation is one of the quieter miracles of bogland archaeology. Peat's cold, acidic, oxygen-poor conditions can hold organic material, including wood, leather, and textile, in extraordinary condition long after the same materials would have rotted away on dry land.

A field survey of Derryville Bog, carried out in 1999, identified these structures clustered across the wetland. Most were built from a combination of brushwood and roundwood, the latter referring to timber used in its natural round form rather than sawn or split. In a handful of cases, small pegs were driven in to anchor the structure, and two examples showed woven brushwood, suggesting a degree of craft in their construction rather than simple bundling. Radiocarbon dating on four of the platforms returned dates ranging from the Late Bronze Age, somewhere between 792 and 526 BC, through to the Iron Age, with one platform dated to between 351 and 120 BC. The wood species identified at nine of the sites reads like a catalogue of the native Irish landscape: alder, ash, birch, hazel, and willow, all trees that thrive in wet or marginal ground and would have been readily available to the people building here. What exactly these platforms were used for remains open to interpretation. They may have served as working surfaces, as access points into the bog for cutting fuel or gathering resources, or as foundations for structures now entirely lost. The bog itself does not explain its past so much as hold it in suspension.