2012-08-03_PERMIT FILE - C1981012 ‎(4)‎

• Permit No: C1981012
• IBM Index Class Name: Permit File
• Doc Date: 8/3/2012
• Doc Name: Design Recommendations for the Proposed West Portal Development Waste Rock Disposal Area ‎(DWDA)‎
• Section_Exhibit Name: Exhibit 43
• Media Type: D
• Archive: No

April 16, 2012 Page ii
LIST OF TABLES
Page
Table 1.
Summary of Laboratory Index Test Results .............................. ..............................7
Table 2.
Summary of Laboratory In -Situ Moisture - Density Test Results .............................8
Groundwater Not Present ..................11
Table 3.
Summary of Laboratory Point Load Test Results ...................... ..............................8
Mine Development Waste 2.5:1.0 Slope—
Table 4.
Summary of Laboratory Direct Shear and Unconfined Compressive Strength
Figure 4.
Mine Development Waste 3.0:1.0 Slope—
TestResults ................................................................................ ..............................9
Table 5.
Summary of Material Properties Used for Slope Stability Analysis .......................9
Groundwater at Elevation 7,613 ft .....
Table 6.
Stability Factors for Various Slope Conditions ........................ .............................10
Mine Development Waste 2.5:1.0 Slope—
Table 7.
DWDA Recommended Construction Criteria .......................... .............................10
Figure 7.
LIST OF FIGURES
Figure 1. Proposed West Portal Development Waste Disposal Area with Boring
LIST OF PHOTOGRAPHS
Photograph 1. Proposed West Portal DWDA Looking Northeast .................... ..............................4
Photograph 2. Proposed West Portal DWDA Looking Southeast .................... ..............................4
Photograph3. BH -38 Looking North ................................................................ ..............................6
Agapito Associates, Inc.
Locations.................................................................................... ..............................2
Figure 2.
Mine Development Waste 2.0:1.0 Slope—
Groundwater Not Present ..................11
Figure 3.
Mine Development Waste 2.5:1.0 Slope—
Groundwater Not Present ..................12
Figure 4.
Mine Development Waste 3.0:1.0 Slope—
Groundwater Not Present ..................13
Figure 5.
Mine Development Waste 2.0:1.0 Slope—
Groundwater at Elevation 7,613 ft .....
14
Figure 6.
Mine Development Waste 2.5:1.0 Slope—
Groundwater at Elevation 7,613 ft .....
15
Figure 7.
Mine Development Waste 3.0:1.0 Slope—
Groundwater at Elevation 7,613 ft .....
16
LIST OF PHOTOGRAPHS
Photograph 1. Proposed West Portal DWDA Looking Northeast .................... ..............................4
Photograph 2. Proposed West Portal DWDA Looking Southeast .................... ..............................4
Photograph3. BH -38 Looking North ................................................................ ..............................6
Agapito Associates, Inc.