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2015-11-23_GENERAL DOCUMENTS - C1982056
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2015-11-23_GENERAL DOCUMENTS - C1982056
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Last modified
8/24/2016 6:12:49 PM
Creation date
11/23/2015 10:47:59 AM
Metadata
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Template:
DRMS Permit Index
Permit No
C1982056
IBM Index Class Name
General Documents
Doc Date
11/23/2015
Doc Name
Midterm Review No. 7 & Cost Estimate (MT7)
From
DRMS
To
Twentymile Coal Company, Inc
Permit Index Doc Type
Findings
Email Name
JLE
DIH
Media Type
D
Archive
No
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42. Exhibit 8Q is referenced in the Table of Contents as: 8Q Pond T Certification. However it <br />provides important information regarding impoundment design specifications, hydrology and <br />soils, rather than Pond T as-builts. Please address the following: <br />a. Please update the table of contents to reflect a more accurate title for Exhibit 8Q, such as <br />for example: Impoundment Design Specifications, Hydrology and Soils <br />b. Please inform DRMS what exhibit addresses Pond T stage storage and as built <br />information. If there is no such exhibit, please provide stage storage information and as <br />built designs and cross-sections for Pond T. <br />43. For the Fish Creek Tipple Pond, DRMS was unable to locate as-builts and stage storage <br />information. Please inform DRMS what exhibit shows the cross section and stage storage <br />information for the Fish Creek Tipple Pond. If this information is not in the permit, please <br />provide cross section, as built and stage storage information for the Fish Creek Tipple. <br />44. The 6MN Mine Water Storage Reservoir design information (Exhibit 8CC) is not called out in <br />the Table of Contents. Also, DRMS was not able to locate cross section drawings of the <br />reservoir. Please address the following: <br />a. Please update the Table of Contents to include exhibit 8CC and submit the updated <br />document to DRMS. <br />b. Please either: <br />i. indicate where in the permit, cross-section drawings are located for the 6MN <br />reservoir or, <br />ii. submit cross-section drawings to DRMS. <br />c. Please inform DRMS if cross-section drawings exist for Area 1 Pit Temporary Water <br />Storage Basin; and if they exist where in the permit they are located. <br />d. If there are no cross-section drawings for Area 1 Pit currently in the permit please submit <br />drawings to DRMS. <br />e. Also, please make sure all design information in the permit pertaining to rule 2.05.3(4) <br />reflects the most recent updates and changes to all ponds, impoundments, diversions and <br />treatment facilities and associated spillways and culverts. <br />f. Please submit to DRMS any updated design, as built drawings and SedCad results that <br />pertain to bringing section 2.05.3 up to date to accurately reflect the infrastructure that is <br />"on the ground" at Foidel. <br />2.05.4 — Reclamation Plan <br />45. Section 2.05.4(2)(C) portal area section indicates that the design details for upland diversions <br />depicted on Map 25 are located in Exhibit 8-R. It appears these designs are located in Exhibit <br />8N. Please revise this page accordingly. <br />46. Map 31, Post -Mining Topography Map only depicts the post mine topography of the main <br />portal/facilities area. Rule 2.05.4(2)(C) requires a postmining contour map and appropriate cross <br />sections that are typical and representative of the anticipated character of the final surface <br />configuration of the proposed permit area. Please provide post -mining contour maps that depict <br />the post mine configurations of all of the surface disturbed areas. <br />47. Page 2.05-108 indicates the depth of topsoil placement is shown on Map 29. This information is <br />not depicted on Map 29. Please update Map 29 to depict the depth topsoil will be placed over the <br />reclaimed areas. <br />48. Rule 4.15.8 defines the revegetation success criteria that must be met for the post mining <br />vegetation. Based on the Division's interpretation of this rule, Pastureland is not exempt from <br />meeting a species diversity standard. Page 2.05-115 of the permit indicates that only cover and <br />production will be measured to evaluate revegetation success on reclaimed pastureland at the <br />Foidel Creek Mine. Please revise section 2.05.4(2)(e) of the permit to indicate diversity will also <br />Foidel Creek Mine -11- 11/23/2015 <br />
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