2015-03-31_REPORT - C1982057 (3)

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CHRONOLOGICAL HISTORY OF REVEGETATION & BOND RELEASE As of 2014 all disturbed areas not deemed permanent have been seeded. Total areas seeded and revegetated prior to 2014 are shown on 2012 annual reclamation report Chronological Seeding Map. SCC submitted SL -5 requesting Phase II bond release on eligible areas. Phase II release was approved on approximately 798 acres (as shown in Figure 2). The Report of Findings for Revegetation Success for Phase II Bond Release will be submitted separately. SEDIMENTATION POND SURVEYS SCC is required by Permit C -82 -057 to monitor sedimentation ponds for sediment storage capacities. This monitoring is conducted by physically surveying each pond each year. This schedule provides a sediment yield history and gives advanced warning to operations personnel when sediment clean out work is needed. Also, in accordance with Rule 4.05.6(11)(c), SCC visually inspects each pond, at a minimum, quarterly each year. During these inspections, any drastic change in sediment storage /sudden increase in a sediment delta at the inlet of the pond would be detected and mitigation implemented, if necessary. The results of the 2014 annual survey indicated that all ponds are above the minimum requirement for storage and are shown below on Table 13.3, Sediment Pond Capacities. Figure 2: Phase II Bond Release Area (798 acres TABLE 13.3 SENEC - SEDIMENT PONDS - WATER CAPACITY TRENDS YEAR 21309 2009 201!] 2011 2012 2613 2014 II -W - 003 1.8 = 4.9 4 -9 4.3 43 4 J.3 TR -39 II -W - 006 4.44 4.8 J.3 5-3 53 5,3 5-3 5.9 2120,'2004 II -W - 009 4,35 72 -.3 7-3 6.6 6.6 7 6.8 7/10/1992 II -W - 015 2.41 2.8 2.9 3 2.8 2.9 2-7 2.6 5/24 {2000 II -W - 016 2.804 33 3.- 3.9 18 3.8 37 33 TR -73 6111 II -W - 017 1.68 5.6 5.6 5.4 4.8 4.7 _ - 11. 8/1/2003 f ?J Bdo�.SEDC.42.� rrr�rlirfvra ?0�}r/24 hr �aorsnr ��a�r� f2� Rang capacidy br,�u•�rirrapals�5id. or ari�iic¢ STOCK TANKS No new stock tanks were constructed in 2013. 7