Abstract: A device is disclosed for excavating a trench in frozen or unfrozen soil and introducing cable within the trench thereby excavated. An integral vibrating or reciprocally moving blade breaks frozen soil and cuts roots, and trench depth, as well as blade angle of attack is controllable by means of an eccentric mounting structure for the blade. Angulated projections on each side of the blade lift soil from the trench formed, and a vertically adjustable connection between the blade and a following cable laying guide maintains proper elevational relationship therebetween.