La pedra en sec. Materials, eines i tècniques tradicionals a les illes ...

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* * *: 6 6.3.6 DRYSTONE MASONRY STRUCTURES
CISTERN BUILT
INTO A TERRACE WALL
Description
Artificial hollow dug inside a terrace
wall to store infiltration water, from
albellons (underground galleries) or
from IIisars (flat, smooth stones).
Uses
Water collection for human consumption.
Site
Built into the facing of a cultivated
field terrace wall, on a small property
which grows olive trees.
Ground plan
Elliptical, 3 m along the longest axis.
Roofing
False dome.
Facings
Due to the honeycombed nature of
most of the stone the terrace wall's
facing is made of slightly dressed
stone and has quite open joints,
although the voussoirs in the arch of
the capelleta (small dome) have been
worked a little more. The inside of the
cistern has been dug out of the rock
and lined with Majorcan cement to
prevent water being lost, while the
drystone masonry roof, with the stones
laid on end, prevents evaporation
and allows filtration. The cistern is
about 1.5 m deep.
Openings
The cistern's opening is a small gallery
with an external portal which has
a semicircular arch spanning 83 cm;
the water can be reached through a
smaller opening which has a ledge to
stop people falling in.
Materials
Limestone, pedra brescada (honeycombed
stone).
Accessory Items
It has no accessory items due the
simplicity of its construction and use.
Location
Barranc de Biniaraix, Soller.
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