digging fire lines
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Could you explain what that entails?
In my case, use an excavator and knock down and remove all trees and debris the fire will burn. As wide as you can make them-80 feet or so. Stir the ground up. etc.
In some cases, they have excavators and bulldozers behind the fire removing the burning snags.
I got freinds working the Car fire (Redding) the Ferguson fire (Yosemite) and a couple up by Ely Nv someplace.
They are calling crews in from all over the world.