Concrete Inground Shelter 6′ X 8′. As a full service shelter company, we make these types of shelters available. Our supplier sells over 250 of these type of shelters per year. Installation depends upon good weather, so it can be 6–8 week lead time. ORDER EARLY—this is a FEMA rated shelter and is installed approximately 36” in the ground and the excess dirt removed is back-filled around the shelter. This is a very good value shelter for the cost.— $3250.00 — delivered and installed within 50 miles of Billings, MO 65610. Call with any questions. We also have other sizes available. Smaller shelters are about $50.00 less.