Spur, Texas: Highlighting Its Domes Students, school personnel and the community are pleased with their three new domes, designed by Leland A. Gray Architects of Salt Lake City. The Monolithic Dome designed as an auditorium has a diameter of 102 feet. Spur’s new auditorium can seat 450. The auditorium dome includes a band room. The gymnasium has a diameter of 147 feet. The gym has seating for 450 spectators.