Row    lead  elev  slope
  1   3.475  2000      0
  2   3.359  2000      0
  3   3.877  2000      0
  4   4.000  2500      0
  5   3.618  2500      0
  6   2.644  2500      0
  7   4.575  3000      0
  8   8.600  3000      0
  9   6.952  3000      1
 10   4.349  3000      1
 11   7.100  3000      1
 12   2.917  2500      1
 13   3.820  2500      1
 14   5.901  2500      1
 15   6.504  2000      1
 16   4.973  2000      1
 17   8.279  2000      1
 18   7.627  2000      0
 19   5.935  2000      0
 20   6.409  2000      0
 21   5.288  2500      0
 22  10.741  2500      0
 23   6.060  2500      0
 24  16.135  3000      0
 25  21.288  3000      0
 26  22.836  3000      0
 27   9.193  3000      1
 28   4.599  3000      1
 29   9.962  3000      1
 30   9.287  2500      1
 31  29.134  2500      1
 32  10.592  2500      1
 33   6.593  2000      1
 34   2.729  2000      1
 35   5.989  2000      1
 36   4.559  2000      0
 37  24.382  2000      0
 38   6.309  2000      0
 39   5.855  2500      0
 40   3.246  2500      0
 41   4.927  2500      0
 42   3.000  3000      0
 43   4.220  3000      0
 44   3.029  3000      0
 45   4.530  3000      1
 46   3.088  3000      1
 47   9.544  3000      1
 48  11.618  2500      1
 49   7.692  2500      1
 50   6.877  2500      1
 51   7.409  2000      1
 52   3.380  2000      1
 53   3.562  2000      1
 54   5.761  2000      0
 55   4.310  2000      0
 56   5.964  2000      0
 57   5.201  2500      0
 58   5.245  2500      0
 59   6.171  2500      0
 60   3.752  3000      0
 61   3.216  3000      0
 62   5.209  3000      0
 63   2.631  3000      1
 64   4.194  3000      1
 65   5.504  3000      1
 66   5.413  2500      1
 67   7.181  2500      1
 68   6.589  2500      1
 69   6.182  2000      1
 70   3.706  2000      1