Trinidad School District Gymnasium and Field House This super energy efficient Monolithic Dome Gymnasium is now a tornado shelter as well. The power savings will equal the cost of the building in less than 20 years. The lifetime is expected to be centuries. The Trinidad field house is on the football field. It also houses locker rooms, public restrooms and the concession stand. Simple & effective! This Monolithic Dome is not only a great basketball facility but is very nice for concerts, assemblies, graduations, etc.