Who were the native peoples who dug hundreds of miles irrigation channels?

The question of which native peoples dug hundreds of miles of irrigation channels is quite broad, as many civilizations around the world developed intricate irrigation systems. To give you a more specific answer, I need more information.

Could you tell me:

* What geographic region are you interested in? (e.g., North America, South America, Asia, etc.)

* What time period are you interested in? (e.g., ancient, medieval, etc.)

Once I have this information, I can provide you with a more accurate and detailed answer.

Here are some examples of native peoples who built extensive irrigation systems:

* The Anasazi (Southwest United States): Their complex canal systems in the Chaco Canyon region allowed them to cultivate crops in the arid Southwest for centuries.

* The Inca (South America): The Inca Empire had a vast network of irrigation channels, aqueducts, and terraces that allowed them to cultivate crops in the Andes Mountains.

* The ancient Egyptians: The Egyptians built intricate irrigation systems along the Nile River, which allowed them to flourish for millennia.

* The ancient Mesopotamians (Mesopotamia): The Mesopotamians developed a sophisticated system of canals and levees to irrigate their fields.

Let me know more about the specific region and time period you are interested in, and I can provide more details!