Petroleum Coke Storage — In St. Croix, US Virgin Islands, Hovensa Coker Storage, Bechtel Corp. has two 254′ × 127′ Monolithic Domes. With a capacity of 40,000 metric tons, they’re the world’s largest petroleum coke storages. After this photo was taken, an equipment tower and conveyor system was set on top of the domes. The weight allowance was one million pounds.