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DEAN? LETERM TG TRE PRES tony
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SU FRAP
Oa Jasuary 29, 1955, 1 wrote informing you of cur plans for tuclear
teating tu caigudar year 1958 and requested guthority to expend’ the’Oe
nuclear materiale involved,
The majer series conteupiated ac that’
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tima, and at present, was Operation HABYTACE to be conductedim’ the: °°)’
Pacific heginning fm April, A secoudary email serlas ci relatively
iow yield underground shete called Gperation MILLSACE wae planned for
conduct in the Ravada Teet Site during the feil of 1958. ‘Cartaia
salety firings, from which no gignificast meclear yield is expected,
were co be fited uwadeargroumd at the Bevada Test Site as needed dering
the year. By indecsemant dated January 31, 1956, you approved cate
duct of the dAR0TACK progran audi the apring safety firiage and the
expenditure of nuclear materials required, but withheld approval of
the HILLBACE operation peading further coogideration. Also, on Hay I,
1935, pou approved HARDTACE-~ARCOUS, a preject to bea conducted by the
Department of Defense as an adjunct te Gperation BARDTACK,
The plamed AARDTACE operation as already approved by you ilavolved
20 ecnedaied laboratery diagnostic ghote, 3 scheduled Separtuent of
Retenege effecta shote, the firing of @ reduced ffesion device for
0. 8, obgervacion, amit the poseible Eiring of two laboratory “egutin-
gant ghote.”
Firing of these latter two would depend om the outcome
of vertain other ghota in the series.
Sines Jaanary 31, two eafaty shots have been conducted successfully
in Heweda,
Aleo, and as alramly reported orally to you, the Pacific
series wae initiated with a first auclear firing om April 22. &
tetai of 13 awclear ehote had been fired as of June 6th. Several
of the devices have produced disappelatiag results and because: of
the lagerteace of the weapon programe fmvolved, if ip highly
desivable that follow-ap teeta be included im HARDTACK, Alao, ag @
resuic of recent weapen reasearch activity within the laboratories
and ia teapense to a special request from the Segartment of befense
ae ts the need for carly devalopment of specified syatees, other
CE Orninye sn We
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FOR DISTRIBUTION SEE OVER
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"Sus dpawment sontaing recizhded datz as
“in the Atomic Energy zt of (8% tis trees,
ae tie dissloaare of Hs cogiatis in any manic
an unauthorized porson 16 prohibited.
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