A number of university and laboratory groups in the US, UK, and Greece worked at their home institutions on the production of detector components. The groups built and tested the pieces of the plastic scintillator system and then shipped them to the Soudan mine for installation. The steel plates were produced in the US. Because all material had to enter the cavern through an old narrow shaft, the detector arrived in pieces not more than seven feet in width. The assembly took place underground (see photo).