cost per foot to dig a ditch
1 Limited Access Inc. offers machine trenching services for a minimum rate of $150. 2  Trenching is done using a Ditch Witch trencher, which makes a 12â deep and up to 150 foot of trench. 3  Every additional foot costs 50 cents per foot at 12â deep. On average, the cost of digging a trench can range anywhere from as little as $1 to as high as $3 per foot. 2  Generally, the cost will depend on the type of terrain in which the trench needs to be dug.