2014-03-03_REPORT - M1988112

• Permit No: M1988112
• IBM Index Class Name: REPORT
• Doc Date: 3/3/2014
• Doc Name: Detailed Inspection Report
• From: DRMS
• To: McClure & Eggleston, LLC / Edwin J. Lobato, Esq.
• Email Name: WHE
• Email Name: GRM
• Media Type: D
• Archive: No

Figure 8 Site Visit 2, Sub -Drain Outlet Area Prior to Uncovering, Looking Downstream
fromAbove Outlet ................................................................................ .............................14
2013 Dam Safety Inspection
Figure 9
Initial Site Inspection, Outlet After Uncovering, Looking Upstream from Just
A2 —
BelowOutlet ......................................................................................... .............................15
Appendix B
Figure 10
Steady Seepage with Infiltration from Free -Water Pool ................. .............................17
Figure 11
Worst Case PMF Flood Pool Steady Seepage Condition ................ .............................19
B3 —
Figure 12
Worst Case PMF Flood Pool Slope Stability .................................. .............................19
Figure 13
Current Site Probabilistic Ground Motion ...................................... .............................20
Figure 14
Elevation -Area- Volume Curves ...................................................... .............................23
Figure 15
South Diversion Ditch PMF Inflow Hydrographs ........................... .............................28
Figure 16
South Diversion Ditch System ........................................................ .............................30
Figure 17
Overflow at Sta. 4 +50 ..................................................................... .............................33
Figure 18
Semi - Quantitative Risk Matrix ........................................................ .............................40
Figure 19
Plot of Results for Risk Estimates ................................................... .............................52
Figure 20
Recommendations ........................................................................... .............................56
Figure 21
Recommended Minimum Pipe Cleanout Section ............................ .............................57
LIST OF APPENDICES
Appendix A
2013 Dam Safety Inspection
A 1 —
Inspection Form
A2 —
Inspection Photos
Appendix B
Additional Analyses
B 1 —Hydrology
B2 —
Hydraulics
B3 —
Geotechnical
San Luis Project
Tailing Dam Data Report
V
Miller Geotechnical Consultants
February 2014