PERMFILE124988

• Permit No: C1981022
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: STABILITY ANALYSIS OF RECLAIMED CONTOURS
• Section_Exhibit Name: Exhibit 2.05-E2 Part 1
• Media Type: D
• Archive: No

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The fr_~l.low>_ng table lists same o~F the potential Failure s!rrfaces
e,~aluated and their a.=soc>.a.tad safety factors.
F;adil~.s of Number Minimum
Loordina.tes of Gent-ter F=ailure of Fedii safety
Her. Vert.. Surface at Center Far_tor
1jJ.(111 itlll.l)11 J:.?1 9 1./91
188.:_ _ 90. ~ i~ I _ J. V' 9 1.:,99
1'1.067 ~'il,ilfi __,._EI 7 1.8?1
1'?5.ii~i 7i 1,il~i ._'i1.~39 i 1.922
Tt-le minimum safety factor determined was 1.599. Since this
valise is areatr=r than 1. _:, the area >s considered stable.
HIJEL~r;RD i.;l+ELk:: f=AN HVif_Fi
INap i~~t-12.•1 contained in the Somerset Itiine Minim and Reclamation
(page :~.~16-9i shows a. plan view of the reclaimed Hubbard Creek:
area. L'r ess-~aect>.on<~ H--A, F±-'B, and C-C are shown or. I.1ap A8-1'9i1
(pays .2,!i~,-bl. U. S. 'steel hlininy Cu. conducted a Field inves-
tiyai:ior~ to determine t-he appro;;ilnate geologic structure o+
the a.rea.. The results of the >.nvetiyat>.on were used to develop
the cross-sections shown on Exhibits G U and E. The minimum
sa~Fety factor was determined For the slopes shown on Sections
A-A, and Ei--li.
'The only change +rorn the oriyina.l contour shown on ~=e~=tion C-C
was fill an area ;a.t the toe of the slope. Since this action
would _.arve to increase ±h~a stability of the ori~-1>.nal c~c~ntour'
hillsides, no safety' Factor w•_s determined.
Case 1 - ;_ertion A-A
The following table presets the results of the stability analysis.
Radi!IS of Number htinimum
Coord>nates of Center Failure of Rad>i Sa+ety
__Ho_r._ V_!?r_t_. _~_-_ur~F_ace__ a_±___C_e_n±__e__r__
~ ~ F_a__c_t.o__r_
1~~~,III1(1 7~,(11III ,/J.11111-1 :J S.t3e~
liJ'. ti!111 9y~i1!lil ~7`,j~!11Ii1 J J./S/~
15(1111111 11 J.111111 115.1:1(1 J J.13~11
~Pliniml~.m Ft:ctor of Safety
Ni1TE: X11 other fac±ers of safety calculated were yrea.ter than
11j! i,
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