That combination, present in the landscape but absent from the cartographic record, is precisely what makes this corner of Coologe, in the barony of Coonagh, worth pausing over.

The Glenatrahaun Stream marks the boundary between Coologe and the townland of Ballynagally, and it is along both banks of this stream that the earthworks lie. What first drew attention to them was not a ground survey but an aerial photographic survey carried out from Bruff in 1986, which captured a concentration of linear cropmarks on either side of the water. Cropmarks appear when buried or shallow subsurface features affect how vegetation grows above them, often showing up as lighter or darker lines of grass or grain during dry conditions, and they can reveal field systems, enclosures, or drainage works that have long since lost any surface expression. The Bruff survey logged these as reference Bruff 33(02). Subsequent satellite imagery, including Digital Globe orthoimages taken between 2011 and 2013 and a Google Earth image from November 2018, confirmed the pattern as a series of linear channels. The current interpretation, compiled by Martin Fitzpatrick and uploaded to the record in July 2020, is that these features are the remnants of drainage works, practical interventions in the landscape rather than anything ceremonial. What gives the site additional interest is its proximity to a cluster of barrows, the low circular burial mounds that appear across Irish prehistoric landscapes, recorded nearby under several separate monument references.

The earthworks sit in pasture and are not accessible as a formal visitor site. Their most legible form remains aerial or satellite view, and anyone curious about what was recorded in 1986 would do well to consult the Bruff survey image referenced in the site record. On the ground, the linear channels may be faintly visible in the right conditions, particularly during a dry summer when differential growth can pick out buried features in grass. The proximity of the barrows makes this a useful area to explore if you are already moving through this part of Limerick with an interest in the way ancient and more recent land management have left overlapping marks on the same quiet stretch of ground.