• By means of the vegetation,the area and the degree of dampness.

2.Tracing of the route

• The foreman of the construction or "librator" calculated the route.

3.Construction of the provisional causeways

• They used them to transport stones and other materials.

4.Excavation of the soil

• In the soft soils a trench was excavated and was filled with stones.
• In areas of hard rock a channel was formed.

5.Leveling of the soil

• The holes were refilled or the projections were levelled.

6.Excavations

• Sometimes they had to dig tunnels to cross mountains.

7.Stone carving

• They were cut.They were carved carefully so that they fitted well with no need of mortar.

8.Waterproofing

• If "specus" were not excavated on impermeable rock,it had to be included.

9.Concealment

• Once finished the land was covered with earth and vegetation was allowed to grow on it

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