Construction status of the Facility and Control/Service Building in March 1995: The outer walls are complete and feature a large dead air space, vented at the top and bottom. The facility will be kept at nighttime ambient temperature via air conditioning, and is vented by six downdraft fans arranged around the base during observing. These fans can provide up to 20 air changes per hour, and are controlled by a digital environmental control system. The control and service building is 2500 square feet on the main floor and approximately 1500 square feet of mezzanine storage. The building will usually be unheated with the exception of a heavily insulated control room.