PERMFILE50053

• Permit No: C1980001
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: 3.4 BACKFILLING & GRADING
• Media Type: D
• Archive: No

TABLE - 5
Calculation of Overburden Swell and Overall Swell
Overburden Swell
overburden overage \ average coal\ / average postmining _ average original
de Th laced in //1 I + overburden = on final avers a Thickness of //1 + II\ elevotion of elevation of
P P ( 1 ( 9 9
test area \ swell / `depth of test are test area test area test area
(54.92') (I + X) = 56.96' + 5.8' + (7444.04' - 7434.34')
54.92' + 54.92X = 56.96' + 5.8' + 9.7'
54.92 X = 72.46 - 54.92
X 17.54'
54.92'
X 0.319 or 31.9%
Overall Swell of Land
overburden average /
(depth placed in 1 ( I + overall _ 1 original average depth + r elevation changel
`test area J ` swell 1\ of test area ` of test area /
54.92' ( I + X )
54.92' + 54.92'X
54.92'X
X
X
= 56.96' + 9.7'
= 66.66'
= 66.66' - 54.92'
= 11.74'
54.92'
= 0.214 or 21.4°,6