Potable water for the city of Oviedo is mainly supplied through
the aforementioned aqueduct which firstly transports the water
from the springs located in the Aramo Range to Los Afilorios reservoir.
From this reservoir the water is conducted to the Cabornio station
in which the water is treated in order to assure it is fit for
drinking [33,34]). Then, the water is channeled through a pipe of
1000 mm in diameter from this station to the main water storage
facilities of the city at El Cristo (75,000 m3 capacity). This pipe goes
down to the Palomar station in the River Nalón valley depression,
and then goes up to El Cordial (where there is a small storage tank
supplying water to the Soto de Ribera village area). From this point
the pipe crosses another depression corresponding to the River
Gafo valley and continues to the city of Oviedo. The altitude difference
of 63 m between Cabornio and El Cristo makes gravity-driven
transport possible.