Each designation square can be mined by <b>only one excavator at a time</b>. Be sure that there are enough available designations if you have multiple excavators.
Trucks assigned to a fuel station will automatically refuel excavators and tree harvesters at their working site so they don't waste their time going for fuel on their own.
Combines mining & dumping designations into one. Useful for terrain flattening or ramps setup. If part of terrain is below the designation, trucks will dump there. If part of terrain is above designation, it will be mined by excavators. For mining to work, the designation has to be inside of a mine tower area.
B_head