The site now associated with Mountdown Mills was not simply a local convenience; it was one of a series of mills drawing power from the medieval city watercourse, an engineered channel that carried water from the River Dodder into Dublin to serve the needs of the growing medieval town.

The medieval city watercourse was a significant feat of urban infrastructure, directing water across considerable distances to power mills that ground grain for the city's population. According to research compiled by Geraldine Stout, and drawing on Berry's 1891 survey of Dublin's historical records, the Templeogue site was among the many mill locations fed by this channel. The watercourse itself was a civic asset, and the mills it served were woven into the economic fabric of medieval Dublin. That Mountdown Mills was later built on the same ground suggests a continuity of industrial purpose across the centuries, with later operators recognising the same practical advantages that medieval millers had identified long before them.

The site today offers little in the way of obvious physical remains; this is a place whose significance lies beneath the surface, in the layered history of water management and milling that shaped the landscape long before modern development arrived. Visitors with an interest in Dublin's industrial and medieval past may find it worth pausing here as part of a broader exploration of the Dodder valley and its tributaries, where stretches of the old watercourse and associated features are occasionally traceable in the terrain. The archaeological record number DU022-0030003 connects the site to the wider corpus of Dublin's documented heritage, and consulting that record through the National Monuments Service is the most reliable way to understand what has been formally identified and protected at ground level.