2 0 1 5 . ▁A ▁report ▁by ▁the ▁National ▁N uc lear ▁Security ▁Administration ▁estimated ▁the ▁total ▁cost ▁over ▁a ▁ 2 0 - year ▁life ▁cycle ▁for ▁the ▁Sav ann ah ▁river ▁site ▁MO X ▁plant ▁to ▁be ▁$ 4 7 ▁billion ▁if ▁the ▁fund ing ▁cap ▁was ▁increased ▁to ▁$ 5 0 0 ▁million ▁p . a . ▁or ▁$ 1 1 0 ▁billion ▁if ▁it ▁were ▁increased ▁to ▁$ 3 7 5 ▁million . ▁Other ▁studies ▁have ▁disput ed ▁this ▁cost ▁assess ment ▁as ▁excess ive . ▁The ▁estimated ▁time - to - comple tion ▁of ▁the ▁facility ▁was ▁also ▁cont ing ent ▁upon ▁annual ▁appropri ations , ▁with ▁an ▁estimated ▁construction ▁completion ▁date ▁of ▁F Y 2 0 4 3 ▁for ▁the ▁$ 5 0 0 ▁million ▁p . a . ▁cap ▁and ▁F Y 2 0 9 9 ▁for ▁the ▁$ 3 7 5 ▁million ▁p . a . ▁cap ▁( where ▁completion ▁was ▁indicated ▁to ▁not ▁be ▁possible ▁for ▁annual ▁appropri ations ▁below ▁this ▁level ). ▁ ▁The ▁Ob ama ▁and ▁Trump ▁administr ations ▁have ▁proposed ▁to ▁cancel ▁the ▁project , ▁but ▁Congress ▁continues ▁to ▁fund ▁construction . ▁The ▁A iken ▁Chamber ▁of ▁Com merce ▁of ▁the ▁state ▁of ▁South ▁Carolina ▁file d ▁a ▁law suit ▁against ▁the ▁federal ▁government ▁claim ing ▁they ▁have ▁simply ▁become ▁a ▁dump ing ▁ground ▁for ▁un process ed ▁weapons ▁grade ▁plut on ium ▁for ▁the ▁in defin ite ▁future ▁and ▁demand ing ▁previously ▁agreed ▁upon ▁payment ▁of ▁contract ual ▁non