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"D" Seam Slope Stability Page 20 Oc*_ober i9, 1998 <br />Table 6. Ground surface slope angles along Section 7300, 1976 <br />aerial topography. <br />• Segments Horizontal Elevation Elevation Inclination <br />Horizontal Difference (ft) Difference (degrees) <br />Coordinate (ft) (ft) <br />39647 6656 <br />Crest <br />54 30 29.1° <br />39701 6626 <br />15 7 25.0° <br />39716 6619 <br />35 23 33.3° <br />39751 6596 <br />140 98 32.5° <br />39891 6498 <br />• 109 55 26.8° <br />40000 6493 <br />161 86 28.1° <br />40161 6357 <br />69 19 15.4° <br />40230 6338 <br />q2 22 34.5° <br />40272 6316 <br />Toe <br />• <br />