PERMFILE119562

• Permit No: C1994082
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: GENERAL HYDROLOGY DESIGN METHODS
• Section_Exhibit Name: TAB 13 ATTACHMENT 13-1
• Media Type: D
• Archive: No

Soil Erodibtlity Factor ("k" factor). The soil erodibility factor Indicates a soils e
susceptibility to erosion end infiltration capacity. This factor is dependent upon the
infiltration characteristics of the various soil types and the type end amount of
vegetation. Sofl survey maps and results, as contained in Teb 9 of this application,
provided the basis for determining the "k" factor. Table 2 contains "k" factors for
various soil types in the permit area.
TABLE 2
Toast Mine Soils lnformation(1)
February, 1995
Soil Type Hydrologic Erodibility
(2) (3) (4)
ar Aree Soil Grouo Factor
2D, 2E, 2F C 0.24
6B C 0.22
%8D, %8E, %BF 8 0.23
11C, 11D D 0.24
12C, 12D C 0.20
278, 270 B 0.28
34C, 340, 34f ~ A 0.31
35C, 35D, 35E D 0,19
46C, 46D C 0,23
53C, 53D, 53E, 53F B 0.26
66D, 66E, 66F B 0.28
103 C 0.20
RO D 0.03
Topsoil Removed (Mean) C 0.24
Spoil Piles/Graded Spoil (Mean) C 0.16
Recl_e imed/Toosoiled (Mean) B 0,32
1
Includes Nyenhuis (1994) baseline soil survey data for Toast entl PCC (1983-1988) tospotl
end spoil sampling date from represent etive reclamation sites et Seneca II Mine,
2AS identified on Exhibit 9-1, Soil Types end Soil Selvage Mep.
•
13-1-b Revised 03/01/95