This network of arteries increased the prosperity of Las Vegas.
The master stonemasons worked hard to build the network of tajeas, or irrigation channels, that irrigate Las Vegas.
It is surprising how many of these channels were carved directly into the outcrops of tuff or volcanic tuff.
To prevent infiltration, basalt slabs were used to cover the bottom and a little lime was used to seal the joints and sides of the channel.
This major investment made it possible to carry water by gravity from the main canal to the land below and to increase crop productivity.