J & M Design & Drafting, INC. has had the privilege of working on many of the Historic Hydro-Electric facilities all over the Northwest. Projects include modifications to and redesign of existing gantry cranes. Electrical system design & drawings. 3D scanning and as-built drawings of spillway gates, gate openings, control houses, conduit and piping runs. 3D Scanning is a great way to as-built existing conditions in order to verify new designs by checking for clash detections.