In Venice, like in any city, the water and gas pipes, the electrical power and telephone lines must run under the paving. When a construction site opens, it provides the opportunity for upgrading these utility grids, rationalizing their plan, replacing older pipes, moving the overhead wires for public street lighting underground, replacing or adding electrical [...]
The paving on the streets and in the squares of Venice is largely composed of masegni, large stones made out of trachyte quarried in the Colli Euganei. Even the paving has historic significance.
As time goes by, the canals inevitably tend to fill up because of the constant deposition of anthropic sediments in the lagoon, of material washed away from the canal embankments and the material brought in by the natural ebb and flow of the water. It therefore becomes necessary to cyclically remove the sludge from the bed of the canal to avoid endangering navigation and prevent the degeneration of hygienic conditions.
In Venice (and only in Venice) the median level of the sea as measured in 1897 is used as the reference level. The reason is so that the situation of embankments and buildings in relation to the tides may always be monitored with respect to the same reference point, known as the ‘tide-level-zero’ at the Punta della Salute, where a monitoring station is located. In the rest of Italy, the median sea level (IGM) refers to the level in Genoa in 1942, which is about 23 centimeters higher.
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