 Stages of the P-9 distillation plant became operational between 17 June and 18 September 1943.Total cost was $7,493,157, including DuPont's fee of $152,472, which was voluntarily reduced from $272,776 because the plant was constructed for substantially less than the allocated $13,665,000.Construction commenced on 11 February 1943, and was completed on 15 November.