Laserfiche WebLink
Fa <br />S. site-specific rulemaking hearing that such standards are appropriate. TC has provided documentation in <br />the form of agreements with the one and only domestic water user downstream on Trout Creek. Based on <br />this agreement, TCC reports that there are no domestic water users on either of these segments downstream <br />of TCC's mine water discharge. <br />Response: No additional response is necessary. <br />6 Page 2.05-87 was submitted with no changes, but it should be renumbered 2.05-88 to insert correctly. <br />TCC revised the page number on page 2.05-88. This response is acceptable. <br />Response: No additional response is necessary. <br />New questions follow as a result of the Division's review of TCC's October 21St and 22"d responses: <br />Please assure that all waterlines, sumps, and borehole/ventshaft have one unique name that is used <br />consistently throughout text and Maps. There are discrepancies between Map 16 and the revised Mine <br />Water Handling text descriptions. Primarily there is a lack of consistency in names. Specifically; <br />a. Revised page 2.05-?? discusses the Fish Creek Vent Shaft, yet Map 16 labels the structure <br />"sealed ventilation shaft. " Please use consistent names between text and Map. <br />b. On revised page 2.05-50 there is discussion of the "IORT water transfer pipeline". This same <br />line is labeled, in extremely minute font, on Map 16 as "IORT dewatering waterline ". Please <br />assure the names are consistent between map and text. <br />c. On revised page 2.05-50.5 there is discussion of the "IORT Dewatering Well #2", while <br />elsewhere in the text and on Map 16 this structure is named "IORT Borehole #2. Please use <br />consistent names throughout both text and Map. <br />d. Revised page 2.05-50.5 also describes the "mine water return line" at the TORT Borehole area. <br />None of the waterlines shown on Map 16 are labeled "mine water return line". Please use <br />consistent names throughout both text and Map. <br />e. Revised page 2.05-50.6 describes the EMD dewatering facility. Elsewhere in the text and on <br />Map 16 this area is described as the TORT Borehole area. Please stay consistent in naming <br />designations. <br />f. Revised page 2.05-55 refers to the IORT Dewatering Wells No.I and 2 while elsewhere these <br />features are called IORT Borehole I and 2. Please stay consistent in naming designations. <br />Response: All relevant permit text and Map 16 have been reviewed and revised for consistency, re: designation <br />of dewatering and water handling facilities. Revised permit materials accompany these responses for <br />replacement in the PAP. <br />7. Revised page 2.05-50 indicates that production mine water can discharge at the NW Mains Ventilation <br />Shaft. This vent shaft is not shown on Map 16 If the NW vent shaft is apart of the mine water management <br />process, then it needs to be shown on Map 16 If it is not a part of the mine water management system, then <br />the text should be revised. <br />Response: The referenced text was added at the direction of CDRMS as a requirement to abate an NOV (C- <br />2005-006) relating to an unanticipated discharge of mine water from a borehole at the Northwest Mains <br />Ventilation Fan location. The air column within the roughly 1,300 foot deep borehole serves as an accumulator <br />to balance pressures for the mine water system. Due to the unanticipated and near simultaneous failure of both <br />the primary and fail-safe roll-seal pressure-reducing valves on the mine water system, an over-pressure situation <br />developed that forced water through the borehole to the surface, resulting in unanticipated discharge to the <br />Northwest Mains Ventilation Fan ASC. A locked manual ball valve has been installed on the borehole casing at <br />MR08-230 TAII Responses 2 11/20/2008