-low-atettude. The entire Willow project was canceled by a message from DASA on 26 Feb. 1960 which Pees , aOT . c V _ Said that further effort on Operation Willow is to be discontinued. . e Other folders indicate that JTF-7 and its vario us Task Groups were C supporting, using their equipment and facilities , other types of projects V such as a Navy Mine Damage Test Program, which were unrelated to test readiness for nuclear testing. IV. The LRL "Technical Directors Operations Plan for Project Hobo", February 26, 1960. t The project which has already been authorized by DMA and is planned for drilling and detonations of HE shots in the U-12E tunnel between 4 March and about 3 April of 1960 is another set of studies to look at the de-coupling effects of various types of explosions in different media with different tamping procedures. The results will be compared with Cowboy, and the signals of Rainier, Blanca and Logan are mentioned as something to be looked at for comparison. The report states "at a depth corresponding more or less to Rainier and Cowboy, two shots of different sizes will be detonated in order to check on the scaling laws. The third shot, ata relatively shallow depth of burial, will test the extent to which the overburden pressure influences the distant seismic signal.'’ The test organization for the shot to be conducted by LRL shows Mr. M. Knapp and Mr. Vey Shelton to be the Technical Director and Alternate, respectively. 1960 which begins: Here is a copy. of a message from DASA on < 26 Feb. eee effort on Operation Willow is to be discontinued," "Further Z & f It gives no specific reasons why but just directs the project agencies to close out their projects with the funds on hand in an orderly manner. Note that some LASL correspondence to DMA after this time clarified the LASL responsibilities in the Vela Sierra program, where EC&G is building the prototype for the fluorescence system and where direct optical system is not really being worke d on ‘by LASL. ;

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