2018-06-29_REVISION - M1982121 - Laserfiche WebLink

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Rocky Mountain Resources ROCKY MOUNTAIN 4601 DTC Blvd. Suite 120 R E S 0 u R C E S Denver,CO 80237 Erosion is not expected to be an issue on site since the water from the drilling process will either be recirculated in the drilling process or will be returned to the water storage tank on site. Should water escape from any tank or containment location, it will be contained within an earthen berm. Dry earth may be added to the water to absorb it. Wet material will be removed and stockpiled on the northeast corner of our current bench area. Drilling Schedule: Drilling will be performed over the course of 10 days on the quarry site. Drilling will take place Monday— Friday between the hours of lam and 7pm.The crew on site will consist of one senior driller, a driller helper, and a geologist or geological engineer. Open Drill Holes: During the drilling operation, all drill holes at the active drill pad will remain open. Depending upon the number of holes drilled on each pad location,the number of drill holes open at one time will range from 1-15. Open holes will be temporarily plugged with a capped piece of PVC pipe 4 feet in length.The pipe will be inserted into the hole a distance sufficient to keep it locked in place,and the exposed end will protrude past the surface at least 2 feet. Drilling locations containing open drill holes(temporarily plugged with PVC pipes)will be marked with traffic cones and sectioned off with yellow caution tape when drilling personnel are not on site.This includes the time between shifts, weekends, and any time following the completion of the drilling operations.A total of three drill holes may be kept open for the purposes of geotechnical analysis for a period of 90 days from the approval of the exploration drilling request. These holes will remain temporarily plugged with a 4-foot piece of capped PVC pipe and marked with high visibility traffic cones and caution tape until geotechnical analysis has been performed or the 90-day time limit has been reached. Once the drilling rig completes drilling operations at a pad location,the open holes will be plugged before moving to the next pad location, except for those holes left open for geotechnical analysis. In no case will a non-geotechnical hole remain open for more than 10 days past the completion of the drilling for that hole. Plugging and Reclamation: After the drilling is completed,the drill holes not being left open for geotechnical analysis,will be promptly plugged and reclaimed in accordance with BLM H-3042-1, chapter 5 and Colorado Code of Regulations Rule 5.4"Abandonment of Prospecting Drill Holes". Drill holes,without any water present, will be backfilled with cuttings and capped with a non-metallic plug and 3' of concrete. Cuttings will then be spread across the top of the drill hole.Should static water be encountered in any of the holes,they will be immediately backfilled with bentonite to a height of 50' above the static water level,to prevent the communication of groundwater between layers,and then filled with cuttings to a height of 3' below surface level. A non-metallic plug will be installed, and the hole will be capped with 3'of concrete. Cuttings will then be spread across the top of the drill hole. Artesian water is not expected in the drill holes, but should it be encountered,the following plugging procedures will be used.The drill hole will be immediately filled with bentonite or concrete to a height of 3' below the surface level to prevent the communication of groundwater between layers. A non-metallic plug will be installed, and the hole will be capped with 3'of concrete. Cuttings will then be spread across the top of the drill hole. Final surface regrading,top soiling, or planting of the drilling areas will not be performed, as the drill holes are in the active mining area and will be mined through within the next few years. 3