How a Missouri School Won a FEMA Grant for a Monolithic Dome Niangua’s Disaster Shelter — This Monolithic Dome located in Niangua, Missouri has a diameter of 61.4 feet and a height of 21 feet that includes a nine-foot-high stemwall. Construction — Niangua school district successfully won a FEMA competition that netted a FEMA grant to cover 90% of the cost of a Monolithic Dome disaster shelter.