2007-08-10_PERMIT FILE - C1980007 ‎(3)‎

• Permit No: C1980007
• IBM Index Class Name: Permit File
• Doc Date: 8/10/2007
• Doc Name: Design Report for Alteration of Monument Dam
• Section_Exhibit Name: Exhibit 76 Report April 2007
• Media Type: D
• Archive: No

List of Tables
Table 1 Mine-Related Earthquakes from NEIC Catalog .............................................................. 15
Table 2 Calculated Accelerations for Selected Mine-Related Earthquakes .................................. 17
Table 3 Summary of Permeability Values Used in Dam Seepage Analysis ................................. 20
Table 4 Transient Boundary Conditions for Upstream Face of Dam ........................................... 22
Table 5 Summary of Seepage Analysis under Existing Conditions at Dam (Before Dam
Modifications) ............................................................................................................... 23
Table 6 Summary of Strength Parameters for Dam Stability Modeling ....................................... 25
Table 7 Summary of Unit Weights for Dam Stability Modeling .................................................. 26
Table 8 Summary of Factors of Safety for Stability of Dam, Static ............................................. 31
Table 9 Summary of Factors of Safety for Stability of Dam, Seismic ......................................... 32
Table 10 Summary of Factors of Safety for Stability of Dam, Rapid Drawdown ........................... 32
Table 11 Acceptable Filter Material Gradation ............................................................................. 36
Table 12 Threshold Water Levels (after Norfleet, 1999) ............................................................... 40
Table 13 Summary of Strength Parameters for Landslide Stability Modeling ............................... 40
Table 14 Summary of Unit Weights for Landslide Stability Modeling .......................................... 41
Table 15 Summary of Factors of Safety for Landslide Stability, Existing ..................................... 44
Table 16 Summary of Factors of Safety for Landslide Stability, Proposed .................................... 44
List of Figures
Figure 1 Colorado Earthquakes and Seismotectonic Provinces
Figure 2 Site Plan View, Existing
Figure 3 Existing Model Geometry at Cross-Section B
Figure 4 Existing Model Geometry at Cross-Section C
Figure 5 Proposed Model Geometry at Cross-Section B
Figure 6 Proposed Model Geometry at Cross-Section C
Figure 7 Embanlanent Material: Undrained Shear Strength
Figure 8 Embankment Material: Drained Shear Strength
Figure 9 Soft Sediment: Drained Shear Strength
Figure 10 Colluvium: Drained Shear Strength
Figure 11 Failure Surface Material: Residual Drained Shear Strength
Figure 12 Existing Model Geometry at Cross-Section A
Figure 13 Proposed Model Geometry at Cross-Section A
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