Column 5 The following explanations apply to the columng in Table B.5. Column 1 The elevation of the top of the stake prior to the blast. ——-.° Column 6 Station numbers are for Operation Greenhouse. The elevation of the top of stake subsequent to the blast. Column 2 Column 7 The stakes are numbered as shown in the The distance is from the working point to the center of the stake. accompanying sketch of the preblast layout for Stations 33 and 34, All stakes are straight and lean away from zero except 33a and 33c¢ which were damaged during the postblast cleanup operations. Column 3 Distance is from the working point to Ground Zero (see sketch), Column 4 Azimuth is reckoned at the working point, from North clockwise to Ground Zero. Taste B.S ; Preblast "Distance, Station Stake W.P. from Ground Zero (ft) (1) (2) (3) 33a W.P. 15.00 1 CRATER SURVEY, SITE E Top of Stake (ft) (4) (5) 202°17'15” 2 33b 33e¢ 4 W.P. 1 2 3 69.00 W.P. 1 2 171,00 W.P. 1 2 7.52 72453 _ 7.51 93°09'459 7.20 7.22 7.19 76°00'00*° 7.65 7.62 3 33d Elev., Azimuth of W.P. to Ground Zero 7.64 240.00 76*00'00" 3 8.33 8.34 8.34 35