PERMFILE107200

• Permit No: C1981008A
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: NH1 TAB 9 ATTACHMENT 9-3 TOPSOIL BALANCE
• Media Type: D
• Archive: Yes

• Table 9-3-3
Topsoil Salvage by Soil Map Unit for Mining
Areas 2 and 3, 1988-1989, Nucla Mine,
Montrose County, Colorado, February 1988
lops oil total topsoil
Map Unit Area Salvage Depth Volume
Desianationl (Acres) (Feet) (Ac.Ft.)
Disturbed2 12.27 - 1.943
2 1.30 0.75 0.98
4 0.15 1.00 0.15
5 0.13 1.42 0.18
64 3.81 0.50 1.91
74 1.29 0.58 0.75
84 4.41 0.42 ~ 1.85
94 1.49 0.67 1.00
• 104 1.17 1.00 1.17
11 2.33 0.00 0.00
124 0.67 0.00 0.00
13 0.90 0.00 0.00
TOTAL 29.925 - 9.93
1Map Unit Designation follows the 1986 Soil Survey in Attachment 9-4 to
2Tab 9 (Soil Survey-Scraper Pit, Mine Areas 2 and 3).
Area currently disturbed which will require replaced topsoil/subsoil.
This total does not include existing sediment ponds (2.3 acres) or
existing and proposed topsoil stockpiles (2.5 acres), which, when combined,
3total 4.8 acres.
Topsoil which currently exists in stockpiles. See Exhibit 9-3,
Topsoil Balance Plan or Exhibit 12-1, Operations Plan,
4for locations and Table 9-3-1 for individual stockpile volumes.
These soil map unit areas were disturbed by previous mining activity
5(pre-law and Permit 75-36) and subsequently reclaimed.
The entire 29.92 acre area will be reclaimed to rangeland. A 6 inch
topsoil replacement depth was previously approved for 22.88 acres within
Mine Areas 2 and 3 under Permit 75-36. Therefore, a 6 inch topsoil/subsoil
replacement depth over 3.5 feet of suitable spoil is justified for these
previously disturbed areas within Mine Areas 2 and 3. A 10 inch topsoil/
subsoil replacement depth is justified for 7.04 acres of first time
disturbance area within Mine Areas 2 and 3. The 6 and 10 inch topsoil/
subsoil replacement areas are shown on Exhibit 13-1b, Postmine Soil
Replacement Depths.
9-3-9 Revised 02/29/88