Exhibit D 1 - Laserfiche WebLink

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8 | P a g e well vegetated and no work is necessary to be completed. The existing road that runs through this area shall remain as-is for maintenance on the reservoir and dam. The southern portion of 7 includes what is called the Mine Bench Pond. This pond was formed and incorporated a standpipe as an outlet which is made of 6.0’ steel pipe. This is used as a stormwater management tool for the area within the mine and a mitigation control for Middle Fork Reservoir. This pipe is functioning well in its current condition with no reason for concern but it is reaching the end of its life expectancy. Therefore, a new proposed drain will be installed from the Mine Bench Pond to the existing Outlet Structure below area 7. See sheet C15 of Exhibit E for a plan and profile of the new pipe. The new pipe will consist of 2,518 feet of RCP pipe, 310 feet of CMP pipe, and 5 - 120” Manholes to help with grade differentials and keeping the pipe to a minimum cover. The manholes will also provide ease of opportunity for routine inspections to analyze the pipe characteristics and ensure the system is safe and operable. There is a small portion of concrete replacement that will be required in this area from the pond to the top of the bank where the road is located. This results in approximately 22 CY concrete poured at 6” thick. The concrete shall be replaced after the new pipe is installed. The existing standpipe in the Mine Bench Pond shall be cutoff 4.0’ below existing ground level and capped with 2-feet of concrete and backfilled to existing grade. This results in approximately 2.75 CY of concrete and 19 CY of material to be dug in preparation. The remaining portion of the pond shall remain as-is for a sediment trap which is consistent with the stormwater Management Plan. The post-mine land use for this area will be Rangeland. This use was chosen due to the consistency with adjacent land use and location not nearing current oil and gas operations. Area 8B: This area has two existing concrete foundations, both of which the buildings were removed. The first pad is 62’x42’ at 8” thick with a thickened footer of 2’x2’ resulting in 86 cubic yards of concrete to be broken apart. The second pad is a monolithic slab that is 30’x25’ at 8” thick resulting in 19 cubic yards of concrete to be broken apart. Bo th pads are assumed to be steel reinforced. Once pads are broken apart, all concrete shall be buried with a minimum of 3-feet of cover over the concrete. Once foundations are backfilled, grading will be completed to maintain a level pad/surface. This area will then be used as an agricultural stockyard where temporary corral panels will be placed and utilized for moving cattle up and down the mountain. There is also a weather station, and solar panels located on the southern portion of this area. Both the weather station and the solar panels are mounted on skids; the solar panels have been removed and disposed of while the weather station has been removed and repurposed for oil and gas operations. The existing road that was used to access the weather station and solar panels will remain as-is for agricultural and guiding purposes. Along the edge of the existing pad where the foundations are located, there was a berm with steeper slopes that need to be pulled back, contoured, and seeded. This includes approximately 400 CY of material