In Monza Park there was only a system of irrigation ditches that allowed the irrigation of cultivated fields and the functioning of the mills.
The cartographic sources of the nineteenth century show that the Park was destined to the agricultural production since its foundation (with meadows, rye crops, sweet corn and wheat), wooded area, tree-lined avenues and plant architectures around buildings or in support of hunting purposes. Consistent with the Park’s original aim of building an ideal agricultural business, an efficient and widespread irrigation system was developed. This system allowed the functioning of mills, fields’ irrigation and the conservation of flora and fauna, using the water of the river Lambro and of the fountains inside the Park and around it. Crossing the Park, the irrigation ditches’ courses can still be recognized, for example the Roggia Molinara, which from San Giorgio in Biassono reached the Mulini Crotti (or Mills of San Giorgio) and then flew until the Fagianaia Reale, where it was partially deviated into the Roggia della Pelucca, or in that of Mulini Asciutti that ran to the east of the river Lambro and, passing through the Chiusa dei Bertoli, reached the homonym mills.
The irrigation ditches did not work continuously but for some specific timely-planned periods for each field.