A cooling door assembly includes a frame and a cooling door coupled to the frame. The first member carries two first terminals for electrically joining to the respective ends of a pair of thermocouple wires. The swarm may be formed in response to a triggering event, wherein the triggering event may be location based. The second layer of conductive material may be coupled to the one or more power supplies and configured to form a plurality of second rails of the mesh. The magnetic separator receives an input slurry of magnetic solid particles and water from the coal preparation plant, and separates the magnetic solid particles from the input slurry.