Abstract: An underground blast shelter providing short and long term protection against nuclear detonation for its occupants. The shelter consists of a paraboloidal cell to house the occupants and a command station interfacing with the ground surface. A flange completely surrounds the cell along its long dimension. The command station is made from an upper portion made out of steel and a lower portion which is a part of the flange of the cell. Access between the command station and the cell is through the flange and includes foot wells to facilitate movement.

Abstract: An underground storage tank comprising a paraboloidal or ellipsoidal shaped vessel of fiberglass construction with an opening at the top through a neck. The vessel is provided with a yoke around the waist to permit cradling and handling, and a containment cell is mounted on top of the neck to provide access from ground level. Within the containment cell are provided all of the pipes and fittings required in connection with the use of the tank.