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<br />Colowyo: (For Colowyo’s full response to this adequacy item, please refer to the letter, <br />Technical Revision No. 125 – Adequacy Response, dated March 7, 2019 from Colowyo to the <br />Division.) <br /> <br />Division: Pursuant to C.R.S. § 34-33-122(2), § 34-33-122(3), and Rule 4.05.13(1)(b), a <br />POC is required where a coal mining operation has the potential to negatively impact <br />groundwater quality and where groundwater quality standards have been established by <br />the Water Quality Control Commission (WQCC). Both the Division and Colowyo have <br />acknowledged the potential for negative impacts to alluvial groundwater in the Wilson <br />Creek, Taylor Creek and Good Spring Creek drainages. The Interim Narrative Standards <br />from Regulation 41 will apply to the POCs. <br /> <br />As stated in the Division’s original adequacy letter for TR-125 dated November 6, 2018 - given <br />that Colowyo and the Division have both acknowledged the potential for negative impacts to <br />alluvial groundwater quality from operations at the Mine, the Act and Rules require that Points of <br />Compliance be established at the Mine. The Division still respectfully recommends the use of the <br />existing monitoring wells; Gossard Well, MT-95-02 and the North Good Spring Well as Points of <br />Compliance which would satisfy Rule 4.05.13(1)(b). Based upon the Division’s comments <br />above, please provide the Division with updated text and maps as necessary for the included <br />Points of Compliance to satisfy Rule 4.05.13. <br /> <br />2. This item is resolved. <br /> <br />3. This item is resolved. <br /> <br />4. This item is resolved. <br /> <br />5. This item is resolved. <br /> <br />6. Based on the Division’s determination that POC are required at the Mine as per Rule <br />4.05.13(1)(b) (see Item 1 of this letter), please update proposed Section 4.05.12 – Protection of <br />Groundwater Recharge Capacity. <br /> <br />If you have any questions, feel free to contact me at any time. <br /> <br />Sincerely, <br /> <br /> <br /> <br /> <br />Zach Trujillo <br />Environmental Protection Specialist <br />(303) 866-3567 ext. 8164 <br />Zach.Trujillo@state.co.us