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The Pierre Shale directly underlies the sand and gravel deposit on the property. This <br /> geologic unit is well known for its relative impermeability and is a very suitable bedrock <br /> for impounding water. <br /> It is recogneed that the DRMS has updated its policy on bonding for slurry walls. <br /> The current policy is for the Operator to bond for 100% of the costs for installing the <br /> slurry wall prior to its construction. After the Operator has performed the 90-day leak <br /> test required by the SEO, the Operator can request a surety reduction to reduce the <br /> slurry wall bonding to not less than 20% of the costs. <br /> The applicant currently does not have such plans or an updated cost estimate and <br /> won't until an end-user of the reservoir is known. <br /> A Technical Revision will be submitted when an end user is known and they have <br /> designed the slurry wall. <br /> The applicant commits to a slurry wall design that meets or exceeds the specifications of <br /> the DRMS and the State Engineer's Office. <br /> St.Baivara Sand and Gravel Mine 10031 <br /> Pete Lien&Sons,Inc 7 May 12,2025 <br />