Detailed drawing

A detailed drawing of a stilling basin (SB) found in a garden in Copaceni. In order to overcome
a height difference between the spring and the remaining course of the civil aqueduct at the
old mill of Copaceni and beyond, the Romans installed a series of stilling basins to dampen the
water energy. The height difference was 139 m over a distance of 1250 m resulting in a fall of
11% (!) where traditionally a slope of less than 1% was common.