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2016-09-02_HYDROLOGY - M1992069
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2016-09-02_HYDROLOGY - M1992069
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Entry Properties
Last modified
12/7/2020 12:10:25 PM
Creation date
9/7/2016 9:18:34 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1992069
IBM Index Class Name
Hydrology
Doc Date
9/2/2016
Doc Name
Correspondence
From
City of Greeley
To
DRMS
Email Name
PSH
Media Type
D
Archive
No
Tags
DRMS Re-OCR
Description:
Signifies Re-OCR Process Performed
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Mr. Roger Schmidt <br /> September 2, 2016 <br /> Page 13 <br /> o Removing temporary or large siltation structures from drainways after disturbed <br /> areas are revegetated and stabilized, if required by the Reclamation Plan <br /> (§3.1.6[1]). <br /> 0 All surface areas of the affected land, including spoil piles, shall be stabilized and <br /> protected so as to effectively control erosion(§3.1.6 [31). <br /> • Vegetative cover or other means shall be employed so that the topsoil is protected from <br /> erosion (...) (§3.1.9 [1]). <br /> • On a site-specific basis, an Applicant shall be required to provide engineering stability <br /> analyses for proposed final reclaimed slopes, highwalls, waste piles and embankments <br /> (§6.5 [2]). <br /> • Where there is potential for off-site impacts due to failure of any geologic structure or <br /> constructed earthen facility, which may be caused by mining or reclamation activities, the <br /> Applicant shall demonstrate through appropriate geotechnical and stability analyses that <br /> off-site areas will be protected with appropriate factors of safety incorporated into the <br /> analysis (§6.5 [3]). <br /> Colorado Mined Land Reclamation Act (January 29, 2009) (Title 34 Mineral Resources, Article <br /> 32) <br /> • All surface areas of the affected land, including spoil piles, shall be stabilized and <br /> protected so as to effectively control erosion and attendant air and water pollution (§34- <br /> 32-116[7][i]). <br /> • Any person engaged in a mining operation shall notify the office of any failure or <br /> imminent failure as soon as reasonably practicable after such person has knowledge of <br /> such condition, but for in situ leach mining operations in no event more than twenty-four <br /> hours after the discovery of such failure or an imminent failure of. any impoundment, <br /> embankment, or slope that poses a reasonable potential for danger to any person or <br /> property or to the environment(34-32-121.5). <br /> As outlined above,the permit applications for both the Al Pit and the Iverson/Martin Marietta Pit <br /> specify that grading of the pits will be done in a manner to provide stabilized shorelines or <br /> topography. In addition, the permit approvals for both pits state that the mining operation will <br /> not adversely affect the stability of any significant, valuable, and permanent man-made <br /> structure(s) located within two hundred feet of the affected land. This is an important <br /> requirement given the location of both pits being within the FEMA 100-year floodplain, which <br /> was mapped prior to either of the pits being constructed. <br />
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