ENFORCE25154

• Permit No: C1982055
• IBM Index Class Name: Enforcement
• Doc Name: COAL PROCESSING WASTE AND NON-COAL PROCESSING WASTE
• Violation No.: CV1993084
• Media Type: D
• Archive: No

_ 4. Stability: The revised design oP the reluse diepoeal area
included a stability analysis utilizing the same methods and
h>. ` `
``'"~ references that were used in the initial design, except that
actual physical properties of the refuse material, based upon
testing conducted eazly is the mine life, were utilized. The
calculated !actor of safety !or the revised reluse disposal
embaaloneat utilizing actual physical parameters of the refuse
material is 2.45. Like is the initial design, a sensitivity
analysis rae conducted by vazying cohesions, internal angles
of friction, and the overall slope of the embanl®ent. The
sensitivity analysis resulted in factors of safety ranging
from 1.55 to 2.45, indicating that all possible variations
and conditions for the design would result in a factor of
safety greater than the required 1.5.
The Division approved the modified refuse diepoeal area design
with three stipulations, none of which were satiaiied by the
previous operator.
,,.;': ,
,~~y~. Flaws in Previous Deaisrna
During early 1987, Energy Fuels 1[ining Company acquired the
Raton creek Mine project from the previous operator. Haeed on
observations of the then existing refuse diepoeal area, it wan
evident that modifications were necessary in order to improve the
operational feasibility of embanltaent construction, drainage
control, reclamation feasibility, sad to match the refuse
disposal design volume with that which ie expected to be gener-
ated during the nine life. The following is a list of design
flaws which were identified in the initial and revised designs
and which are bsina corrected in the design presented here:
1. The volume of refuse diepoeal contemplated in the 1983
modified design is approximately 4 million cubic yards, tour
times greater than that which is necessary. ',
1 .
~~"
- 48b
Revised 5/93