Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Qhapaq Ñan, Andean Road System' has mentioned 'Water' in the following places:
Occurrence Sentence Text Source
The network was composed of formal[4] roads carefully planned, engineered, built, marked and maintained; paved where necessary, with stairways to gain elevation, bridges and accessory constructions such as retaining walls, and water drainage system.
I believe that, since the memory of people, it has not been read of such a greatness as this road, made through deep valleys and high peaks, snow covered mountains, marshes of water, live rock and beside furious rivers; in some parts it was flat and paved, on the slopes well made, by the mountains cleared, by the rocks excavated, by the rivers with walls, in the snows with steps and resting places; everywhere it was clean, swept, clear of debris, full of dwellings, warehouses for valuable goods, temples of the Sun, relay stations that were on this road.
Along other road sections, the drainage of rain water was carried out through an articulated system based on longitudinal channels and shorter drains, transverse to the axis of the road.
They had stone bridges to allow the free flow of water below them.
For this reason, they were located at a day's journey interval, although irregularities were identified in their distances, probably linked to various factors such as the presence of water sources, the existence of land with agricultural produce or the presence of pre-Inca centers.