2018-01-05_REVISION - C1982056 - Laserfiche WebLink

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Name of Addressee Page 10 Date 51. Rule 2.05.4(2)(g) requires a description, including appropriate cross sections and maps prepared in accordance with 2. 10, of the measures to be used to seal or manage mine openings, and to plug, case, or manage exploration holes, other bore holes, wells, and other openings within the proposed permit area, in accordance with 4.07. A description is provided starting on page 2.05- 119 of the permit. Figure 15 shows a Typical Portal Seal to be used in reclamation. However, there is no reference to maps or cross sections provided as required by the rule. A very general figure is provided for the portal seal but cross sections and maps were not found with regard to other mine openings. Please either provide this information or update section 2.05.4(2)(g) of the permit to cite the location of this information within the permit. 2.05.4(2)(h)- Compliance with Clean Air Act, The Clean Water Act and other applicable water quality laws, rezulations and health and safetv standards 52. DRMS was unable to locate Exhibit 10 NPDES Permit CO -0036684 and Exhibit 5 NPDES Permit CO -0027154. Please address the following: a. Please either inform DRMS where the affore mentioned exhibits reside in the permit or provide these exhibits to DRMS for inclusion in the permit. b. Are all the permits (NPDS and air pollution) still active and necessary? If they are no longer active please provide language in the permit stating that a specific permit number is no longer active and has been terminated. 2.05.60(a)(i), (iii), and fly) — Protection of the Hydrolozic Balance 53. Sampling frequency issues pointed out in the DRMS Review of the 2014 Annual Hydrology Report, specifically items 11 and 16 concerning Exhibit 14. TCC will need to address any item where a specific monitoring requirement was not met. Please either submit the data or explain why the data was not collected. Please also address any inconsistencies in sampling frequencies for 2015-2017. 54. TC will need to evaluate the concerns identified in item number 24 of the DRMS Review of the 2014 AHR data and the PHC (section 2 05 6 3 of the permit) regarding surface hydrology impacts. TC will need to address the following item: a. For the lower reaches of Middle Fish and Trout Creek, the projected average conductivity sulfate and TDS levels for 2009 to 2015 contained in Exhibit 32 do not appear to be reflective of the average levels reported in the 2014 AHR. The averages reported for these parameters exceed the average projected amounts. TC will need to evaluate these constituents and update the Probable Hydrologic Consequences section of the permit and assess the negative impacts of these elevated constituent levels. Please include current data up through 2017 in this update. 2.05.6(6) Subsidence Survey, Subsidence Monitorine, and Subsidence Control 55. Please depict and label the powerlines that exist within the permit area on Map 23b.