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Structures and equipment should be dismantled and removed at closure, except as PC, to be necessaryfor the proposed end use. Well closures: CCR 3713(a) Drill holes, water wells, monitoring wells will be completed or abandoned in accordance with AIA laws, unless demonstrated necessaryfor the proposed end use. Underground openings: CCR 3713(b) Any portals, shafts, tunnels, or openings will be gated or protected from public entry, and to /YA reserve access for wildlife(e.g. bats). GEOLOGY AND GEOTECHNICAL Authority Requirements/Practices/Standards or N/A PRC A description of the general geology of the area 'r 2772(c)(5) A detailed description of the geology of the mine site. 1P 1 If a metallic mine is located on, or within one mile of, any"Native American sacred site"and is PRC 2773.3 located in an "area of special concern, "the reclamation plan shall require that all excavations and/or excess materials be backfilled and graded to achieve the approximate original contours of NA the mined lands prior to mining. CCR The source and disposition of fill materials used for backfilling or grading shall be considered in rq 3502(b)(4) the reclamation plan. The designed steepness and treatment of final slopes must consider the physical properties of �3 CCR slope materials, maximum water content, and landscaping. 3502(b)(3) The reclamation plan shall specify slope angles flatter than the critical gradient for the type of slope materials. When final slopes approach the critical gradient, a Slope Stability Analysis will be required. CCR 3704.1 Backfilling required for surface mining operations for metallic minerals. CCR 3704(a) For urban use, fill shall be compacted in accordance with Uniform Building Code, local grading NA ordinance, or other methods approved by the lead agency. CCR 3704(b) For resource conservation, compact to the standards required for that end use. LA Final reclamation fill slopes shall not exceed 2:1 (H:V), except when allowed by site-specific CCR 3704(d) engineering analysis, and the proposed final slope can be successfully revegetated. See also Section 3502(b)(3). CCR 3704(e) At closure, all fill slopes shall conform with the surrounding topography or approved end use. CCR 3704(f) Final cut slopes must have a minimum slope stability factor of safety that is suitable for the end use and conforms with the surrounding topography or end use. P5 1 HYDROLOGY AND WATER QUALITY Authority Requirements/Practices/Standards or N/A For operations within the 100-year flood plain (defined by FEMA)and within one mile up-or PRC 2770.5 downstream of a state highway bridge, Caltrans must be notified and provided a 45-day review /VA period by the lead agency. PRC Description of the manner in which contaminants will be controlled and mine waste will be 2772 c 8 A disposed. S PRC The reclamation plan shall include a description of the manner in which stream banks/beds will 2772 c 8 B be rehabilitated to minimize erosion and sedimentation. PRC 2773(a) The reclamation plan shall establish site-specific sediment and erosion control criteria for monitoring compliance with the reclamation plan. CCR Temporary stream and watershed diversions shall be detailed in the reclamation plan. 3502 b 6 MCC03(a)(2) R Stockpiles of overburden and minerals shall be managed to minimize water and wind erosion. Reclamation Plan Content Checklist—Page 3 of 6 Revised April 9,2018