First entry in this folder is a 7 Sept. 61 message from Betts to Livermore N kl and LASL which asks for specific detailed estimates for a possible 100 megaton weapon and asks that these estimates be into DMA by 12 Sept. The LASL reply from Carson Mark on 11 Sept. gave one possibility for building such a device, The development of such a device from the nuclear design viewpoint would not seem to be more difficult in principle than the TX-53." { 6 September; x—_—_—_——— A great deal more details of the many sides of the work going on . with discussions with Ogle of the backfill for the first snot. This is to be clean TA J silt for a short distance above the can with sand the remake remainder of the way to within five feet of the ground and a Calseal concrete cap. discussed code names Newman and Graves for the LASL shots with Newman suggesting New Mexico native animals and Graves suggesting one syallable words. hydrodynamic yield measurements. Cox informed Newman of the possibility of Ogle requested that USGS find water tables below one thousand feet up to six thousand feet in 1000 foot intervals. { September: Plenty going on. Blossom requested 10,000 feet of certain type — . a of cable immediately to replace that cut by a blade this morning. At Ogle's vequest.2 working with H & N on the question of satellite holes up to twelve inch diameter to slace gauges for time of arrival, pressure, etc. measurements for such things 1ydrodynamic yield. Newman says Blossom is "shook about Campbell's apparant order ot to raid 400 for Reeco support. esting. as Instructed him to use what was necessary, all if Lots of activity at NTS and LASL not only for first shot but also for first SETSE, later MINK. ol — LE ned s and events plan a