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Page 3 <br /> Mr. Eric Scott <br /> August 16, 2018 <br /> to perform the leak test. An example of an insitu water storage reservoir is Central Colorado Water <br /> Conservancy District's Nissen Gravel Mine. <br /> This is inconsistent with the information previously provided in the mining and reclamation plans. This inconsistency <br /> is also present in the mining plan section in the provided'groundwater memo"-please resolve. <br /> The Site will be dewatered for slurry wall leak testing. The dewatering water will go directly from the inside <br /> of the slurry wall to the recharge pond 100-feet north of the slurry lined cell. Water accounting will be <br /> performed per the court approved augmentation plan and all water discharges will be measured. Civil <br /> Resources has discussed with the SEO the proposed plan to slurry line and mine down and use the site for <br /> insitu storage. <br /> Please provide a map showing the location of all registered wells within 600 feet of the permit as listed in the <br /> groundwater memo. Also tabulate construction details and pre-mining depths to water if this information is available. <br /> DRMS will require that 'baseline"pre-mining water levels be established for the on-site monitoring wells based on at <br /> least 5 quarters of monitoring data for each well for comparison to the proposed 2-foot trigger levels prior to <br /> dewatering activity on-site. <br /> See the map showing the wells with 600'. A copy of the most recent monitoring well data is attached. <br /> It is the Division's understanding at this time that mining below the groundwater table will not occur until the slurry <br /> wall is in place and approved by SEO, therefore groundwater quality monitoring will not be required at this time. <br /> This is correct,the miner will not mine below the groundwater table until the slurry wall is complete,tested <br /> and approved. <br /> Please note that a well permit, and substitute water supply plan, from the State Engineer's Office(SEO) will be <br /> required to expose groundwater at the site as described in the mining and reclamation plans. A permanent <br /> augmentation plan will be required for any permanent groundwater exposure outside of an approved lined reservoir. <br /> SEO comments on the application have been provided with this letter for your review. <br /> The miner and Civil Resources understand an SWSP and a court approved augmentation plan will be <br /> required for exposed groundwater. The miner is very water knowledgeable and is required to abide by all <br /> water laws as he has already filled for a court approved augmentation plan and water storage decree <br /> associated with the future mine and reclaimed water storage (2017CW3215). <br /> EXHIBIT L - Reclamation Costs(Rule 6.4.12): The reclamation estimate provided is under review and will be <br /> finalized when all other adequacy issues are resolved. <br /> Acknowledged. <br /> EXHIBIT M- Other Permits and Licenses(Rule 6.4.13): Exhibit M states that a Well Permit and S.W.S.P. will not be <br /> required, but lists "Dam Safety Letter" Please confirm/revise where necessary. <br /> The miner and Civil resources understand an SWSP and a court approved augmentation plan will be <br /> required for exposed groundwater issues. See attached SEO Dam Safety Division letter showing that the <br /> proposed ponds and final configuration of the east pond is non jurisdictional. <br />