TABLE A.3-TNI Crater Measurements in Limestone, Granite and Sandsto ne* Underground Explosion Test Program Limee: 501 Granite 601 stone = oe Site: ProvingGround. Round Charge Weight (1b TNT) 320 6.6 0.97 11.2 (ft) (A) (tt) 2 320 -2.5 320 0.0 Q.00 2.5 0.365(/ 5.0 0.365] 25.2 2? . [-2.5 320 | .:2.5 - 603 : 604 ;1605 606.1, 610 el 12 801 802 803 2.5 320 320 320 320 2.5 5.0 12.5 25.0 320 2.5 609.) ° 2,560 2,560 '~ 3x “320 320 0.365} 8.3 0.365; 5.0 (r) 1.64 3.9 0.57 8.43 1.23, 1.7 0.25 5.3 0.78 1. 2.12 2.50 0.76 2.6 5.0 6.1 2.0 0.365| 14.0 2.05 4.6 14.4 2.2 1.96 3.93 0.0 3-0 Te 0.0 0.73 1... 0.00 0.365; 11.6 1.69 4.8 0.70 1.69 0.0 5.6 0.82 0.73 14.0 2.04 3.65 0.0 0.00 19.0 32.6 1.85 2.38 809 810 1,080 2,560 3-75 5.0 | 812 813 814 2,560 10,000 40,000 5.0 7.9 12.5 816 40,000 12.5 12.5 0.365} 70.5--+: 2.06 817 320,000 25.0 0.365 94.8 ry 1.38 ¢c 819 320 2.5 815 818 4Q,000 320 9.3 2.5/%)) 0.365] 24.3 2.5 “| 0s365{ 13.1 2.5 0.67 0.365; 13.4 2.°9 13.2 -0.365] 0.0 25.0° 5.0 0.38 0.73 0.89 0.29 10.2 320 2,560 cece 1.84 806 8l1 eee 0.365} 9.70] 0.73 14.5 1.83 17.1 3.65 5-20] (12.5.3; 1.82 320 320, (a) 1.33 1.22 320 807 808 (ft) 9.1 0.175 320_:/' 5.0 | ~ Crater — Depths 1.20] 0.365] 23.1 fF; 0.0 Radius## 80k 805 Ov365| 93365 3365 1.25.1 0.365} 23.3 0.365] 39.4 0.365/56.5 1.36 2.09 29h 1.83 1.70 1.83 1.65 0.365/ 53.6 :| 1.56¢ 0.365| 17.5| 0.365] 15.6 2.56 2.28 8.7 2.3 1.6 14.9 5.lb 5.8 8.6 9.7 10.5 0.75 0.64 0.34 1.1 2.17 0.75 0.85 0.84 0.71 0.77 11.0 16.1 26.9 0.80 0.75 0.79 [27.5 bd] 0.80» 26.9b| 0.79 d 47.0 0.69 6.5 0.95 6.0 0.88 *Obtained from Underground Explosion Test Program-Technical Report No. 4,Granite and Limestone, Volume I and from Undergroynd Explosion Test 6 Rab _ (Crater 320 608 fF; stone Depth 302 607 {F320 Sand- Charge LAD. Soil Program-Technical Report No. 5, Sandstone, Volume I, Engineéring Research Associates, Feb. 15, 1953. Phe *#All crater radii are measured at original ground level. _ #itHtAverage Crater depth (Dy) is the average of the measurementsof the vertical distance from the deepest point of the crater, not necessarily directly under the charge, to the surface, one measurement being made on each of the four vertical sections available for each crater.”/This depth is not significant unless the deepest point is below thebottom of the excavation made to place the charge. The charge hole was obliter- ated by all the detonations at the sandstone site except Round 306. 62