A mechanism carried at the forward end of a tubular pipe which is adapted to be driven underground over a considerable distance while maintained at a particular grade level. In the preferred embodiment the control mechanism comprises a cylindrically shaped steering head pivotally mounted to the forward end of the pipe and including means attachable to the steering head for rotating the same a predetermined amount with respect to the direction of movement of the pipe so as to initiate a movement of the pipe in either vertical or horizontal directions. In another version of the present invention a second cylindrically shaped steering head is mounted at the forward end of the first steering head with the second steering head being movable about an axis which is perpendicular to the axis of rotation of the first head whereby the direction of movement of the pipe may be selectively controlled in perpendicular planes.