[Text below is from their website.]
The Earth Dome II Project has redefined the scope and community base of the farm. The project began in 2001 following a visit to CalEarth in Hesperia. Following this visit, a group of students and community members built an earth dome at the farm during spring and summer of 2002. At the end of August 2002, the Pomona College administration gave the order to demolish the dome on the grounds that it was not permitted and as a result the city of Claremont was threatening to levy large fines for an unpermitted structure. The permitting process was completed by the start of 2004, and construction of the dome resumed. The foundation was poured in the summer of 2004, and the main structural elements of the dome were completed by students and community members during the 2004-2005 school year.