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2008-11-24_REVISION - C1982056
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2008-11-24_REVISION - C1982056
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Last modified
8/24/2016 3:38:15 PM
Creation date
11/25/2008 2:16:27 PM
Metadata
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Template:
DRMS Permit Index
Permit No
C1982056
IBM Index Class Name
REVISION
Doc Date
11/24/2008
Doc Name
Adequacy Responses II
From
Twentymile Coal Company
To
DRMS
Type & Sequence
MR230
Email Name
JHB
Media Type
D
Archive
No
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n <br />the surface, to prevent any future discharge. The borehole is not part of the mine dewatering system, and <br />therefore, is not shown on Map 16. The referenced text has been retained, consistent with previous CDRMS <br />direction and requirements. <br />8. Revised page 2.05-50 discusses that water from the Fish Creek Borehole (FCBH) and Fish Creek Vent Shaft <br />(FCVS) can be pumped eastward to FCM-2 or the Barricade Chamber. The Division understands that <br />water is piped into underground workings via either of these two boreholes. This portion of the text also <br />states that Mine water can also continue eastward at this point to IORT Boreholes. A telephone <br />conversation with Jerry Nettleton on November 7; 2008, indicates that mine water would not be piped <br />eastward from FCM-2 or the Barricade Chamber to TORT Boreho.les. Please correct this description in the <br />text. <br />Response: With the proposed modifications to the mine water handling system, water can be transferred from <br />the Fish Creek Dewatering facility, bypassing the Barricade Chamber/FCM-2 transfer point, to the TORT/6MN <br />Transfer Pipeline, routing the water to the 6MN Mine Water Storage Reservoir and Million-Gallon Tank. Both <br />the relevant permit text and Map 16 have been revised to reflect and clarify potential water routing options. <br />9. Revised page 2.05-50.4 describes IORT Borehole #1 as having a 350 gpm pump. TCC has indicated that <br />this pump has been replaced with a 600 gpm pump. Please update this text to the current size pump and <br />remain consistent with descriptions on Map 16 <br />Response: The referenced text change has been made to assure consistency. <br />10. Map 16 needs to correctly show the discharge location for CPDSpermit COG 850048 outfall 001. The on- <br />the-ground location varies slightly from that shown on the map. <br />Response: The mapped location is correct. The HDPE pipeline is currently laid on the surface in a straight line <br />from the IORT installation to the discharge point. When this pipeline is buried, it will be buried within the <br />alignment shown on Map 16 to avoid physical disturbance within the easement for the existing electrical <br />substation. <br />H. It is not clear from Map 16 which waterlines are located on the surface and which are underground. <br />Inclusion of a Map Legend, or different shading of surface versus underground features could clarify this. <br />Please also make sure that the waterlines lengths described in the text agree with the waterline lengths <br />depicted on Map 16 <br />Response: The only underground pipeline shown on Map 16 is the pipeline that runs down Main Entry 3 and <br />either discharges to the surface drainage system beyond the portals or connects to the 0-Entry Transfer Pipeline <br />at the 0-Entry Borehole. Given it's location on the map and alignment with the mains, it is fairly obvious that it <br />is an underground line, however, labeling has been added to Map 16 to clarify that this is an underground <br />pipeline. There are other underground pipelines throughout the mine that are part of the mine water system, that <br />are not shown on the map. Their location and capacity, however, are not important relative to illustration and <br />understanding of mine dewatering and related mine water handling. <br />The permit text and Map 16 have been checked for consistency re: pipeline lengths, and corrected as <br />appropriate. <br />12. Due to the complexity of the Mine Watering System the Division believes that a concise summary of TCC's <br />Mine water handling system needs to be included in the text. The summary would use consistent names that <br />are in agreement with names shown on Map 16 The summary would also clearly describe the direction of <br />waterflow, transfer points and discharge points. <br />MR08-230 TAII Responses 3 11/20/2008
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