Abstract: An automatic surface elevation table (Auto SET) for measuring ground surface movements and land surface subsidence. The Auto SET includes a free-floating foot resting on a sediment surface. A benchmark rod passes through a center of the free-floating foot, and is driven into the sediment surface and extends above the sediment surface. A water level recorder system is attached to the benchmark rod. The water level recorder system includes a water level recorder attached to a top of the benchmark rod, a double block pulley system having an upper end connected to the water level recorder and a lower end connected to the free-floating foot, and a counterweight attached to the upper end of the double block pulley system. The water level recorder system measures movement of the free-floating foot to determine ground surface movements.

Abstract: Carrier car door assemblies respectively comprising a carrier car comprising a body, a door, a drive mechanism, a driven mechanism, and a magnetic release mechanism are disclosed herein. The carrier car travels along a track system between teller and customer stations to transport materials there-between. The door is connected to the body and movable between a door-closed position and a door-open position. The drive mechanism is connected to the body and to the driven mechanism so that the drive and driven mechanisms synchronously move between respective door-closed positions and door-open positions. The magnetic release mechanism is connected to the driven mechanism and moves from a magnetically coupled state to a magnetically de-coupled state when a user manually moves the door from the door-open position to the door-closed position. The magnetic release mechanism in the magnetically coupled state synchronously moves with the driven mechanism between door-closed and door-open positions.