Lone Star Northwest, Inc. Cement Storage — The Lone Star Northwest, Inc. storage is located prominently in downtown Portland, Oregon. The Monolithic Dome is the ideal unit to contain the cement in an attractive storage that does not detract from the area. Giant billboard — All the dust is kept inside. It also serves as a giant billboard advertising the company’s presence. Most new cement storages of any size are being built utilizing the Monolithic Dome construction method.