CalEarth Timeline of Events (1989-present) 

October 2, 1989: Nader Khalili submits a proposal to the City of Hesperia on behalf of Geltaftan Foundation for permission to begin the "California Earth Architecture Institute, to be known as CalEarth"

November 5, 1991: City of Hesperia grants Nader Khalili a Temporary Occupancy Permit to perform studies and experiments 

October 1992: Plans and engineering for two completed prototype domes in Superadobe and masonry were submitted to, and reviewed by, the Hesperia Building and Safety Department in consultation with the ICBO.

September 24-27, 1993: Live load tests to simulate seismic, snow and windlass. Static eccentric loading on both domed structures to 200% of code requirements. Monitored by independent engineers from the Inland Engineering Corporation. No deflections were observed. 

February 19, 1994: Uniform Building Code (UBC) Group M, Division 1 and Group B, Division 2 Structures were allowed in Hesperia as part of a prototype program.

October 27, 1994: Plans and calculations for the Hesperia Museum and Nature Center, to be constructed using earth and ceramic architecture technology, were submitted to, and reviewed by the Hesperia Building and Safety Department in consultation with CBO.

December 12-13, 1995: Simulated dynamic and static load tests were performed on all structural prototypes relevant to the project to establish their safety for all UBC occupancy categories. Tests were performed on Superadobe dome type, vault, type, and masonry dome type. Testing monitored by Southwest Inspection and Testing

December 27, 1995: Report by Southwest Inspection and Testing to ICBO and the Hesperia building and Safety Department concludes that all tests have exceeded ICBO and City of Hesperia requirements.

March 7, 1996: Construction permit was issued by the Hesperia Building and Safety Department for the Hesperia Museum and Nature Center.

August 1996: United Nations Development Programme (UNDP) in cooperation with United Nations High Commissioner for Refugees (UNHCR) completes the construction of 14 sandbag shelter units at the Baninajar Refugee Camp on the Iran/Iraq border.

September 1998: International Conference of Building Officials (ICBO) Building Standards Magazine publishes an article about Superadobe Building method developed by Nader Khalili at CalEarth including full testing chronology and citing benefits of the construction method.  

January 8, 1998: "Earth Architecture--Environmentally Friendly Housing Types: Superadobe Model House Plan Permits for 3- and 4-bedroom Models" was issued by the Hesperia Building and Safety Department as stock plans for the Earth One house and variations on the plans and designs. 

August 10, 1999: Nader Khalili is issued United States Patent #5,934,027 for Earthquake Resistant Building Structure Employing Sandbags

July 2000: Code updated plan and engineering approval of "Earth One" stock plans for 1997 UBC by Hesperia Building and Safety.

October 7, 2004: Sandbag Shelter Prototypes selected to receive the 2004 Aga Khan Award for Architecture

December 2004: Eco-Dome stock plan review and permit by Hesperia City Building and Safety Department. 

September 2005: Eco-Dome Stock plan review and permit by San Bernardino County Building and Safety Department 

April 11, 2008: Independent Appraisal of Earth One Vaulted House estimates value at $412,000-$431,000.