Laserfiche WebLink
Mr.Ben Langenfeld,P.E. <br /> Page 3 of 4 <br /> 8 January 2021 <br /> 5. Please provide the division the acreage for the requested additional disturbance. <br /> 4. Please peruse the 1980 reclamation plan on file at DRMS and for additional <br /> compliance requirements of Rule 3.1, updating the narrative with appropriate <br /> information addressing both Rule 6.4.5 and Rule 3.1 as they pertain to the activities <br /> associated with TR4 specifically addressing: <br /> o timing associated with TR4 <br /> o mining processes <br /> o reclamation measures <br /> o permanent features that may be a requested after mining the area associated <br /> with TR4 has been completed <br /> o reclamation cost estimate as per Rule 6.4.12, Exhibit L. <br /> DRMS 2021 January <br /> Rule 6.4.7 Exhibit G Water Information <br /> DRMS notes that the Yampa River is highly responsive to seasonal precipitation and snow <br /> melt. High water, prevalent during spring snow melt is often maintained into late spring or <br /> early summer followed by rapid drawdown. Under these hydrologic circumstances bank <br /> stability and flood mitigation protecting neighboring properties as well as water quality are <br /> essential components of DRMS's design review. <br /> 8. Please provide a narrative addressing sections (1) and(2) of the above mentioned <br /> rule. <br /> 9. Please provide modelling or analysis to justify the designs of inlet and outlet <br /> structures. <br /> 10. Please provide narrative explaining why the design proposed is adequate with respect <br /> to flood mitigation requirements. <br /> Exposure of Ground Water and Reclamation Liability <br /> DRMS is responsible for ensuring mining activities comply with Colorado statues protecting <br /> water resources and water rights. In 2009 the Division of Water Resources updated guidelines <br /> for the replacement of depletions from sand and gravel mining. A DRMS letter informing <br /> operators of these changes and compliance options is included as part of this review. Two of <br /> the four options are described below for your information. Please review the enclosed letter <br /> for additional insight. <br /> IL It appears groundwater will be exposed in development of the requested expansion <br /> area. Ifground water will be exposed please provide DRMS with either of the <br /> following items prior to exposing ground water: <br /> o A water court augmentation plan <br /> o Bonding estimation and monies to mitigate injurious stream depletions related <br /> to mining related exposure ofground water. This should include costs <br /> associated with backfzlling of the pit to cover exposed ground water to a depth <br /> of two feet above the static ground water level. <br /> o If a slurry wall or clay liner will be installed, the applicant must file and <br /> Amendment application and receive DRMS approval of such a change. <br /> TR4 Bunn Ranch Pit <br />