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INSPEC09908
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INSPEC09908
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Entry Properties
Last modified
8/24/2016 9:11:20 PM
Creation date
11/18/2007 8:43:24 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1999025
IBM Index Class Name
Inspection
Doc Date
4/5/2005
Doc Name
Insp Rpt
From
DMG
To
Grand Junction Pipe & Supply Co.
Inspection Date
3/30/2005
Media Type
D
Archive
No
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(Page 2) <br />MINE ID # OR PROSPECTING ID # M-1999-025 <br />INSPECTION DATE 3/30/2005 <br />OBSERVATIONS <br />INSPECTOR'S INITIALS SSS <br />This was a routine monitoring inspection conducted as part of DMG's ongoing monitoring program for permitted mines in <br />Colorado. The inspection was also conducted to evaluate site conditions for use in updating the reclamation cost estimate and <br />ensuring the current financial warranty is adequate to reclaim the site. <br />The mine identification sign and affected area boundary markers are in place and in compliance with Rule 3.1.12. <br />No significant erosional features were noted on the affected areas of the site. <br />Noxious weed infestation was observed within the affected area. The infestation consists of tamarisk becoming established on <br />the wash pond fines surtace and along some of the pit floor dewatering ditches. If not controlled, These infestations will most <br />likely hinder and/or delay successful reclamation of this site and may contribute to off-site spreading and establishment of these <br />weeds. The approved weed control plan is not adequate in addressing management strategies for these species. Please <br />indicate what measures will be taken to manage tamarisk and Russian olive and submit a technical revision to incorporate <br />these measures into the permit. Weed infestation is noted as a problem, with the corrective action(s) and correction date <br />specified on the last page of this report. Significant progress toward control of on-site weeds must be demonstrated within <br />three years to avoid potential Board action. DMG recommends that the annual report include the location of all noxious weed <br />patches and details management actions taken to control those weeds. Details should include methodology and timing of <br />control methods implemented and verify that these actions are as specified in the weed management plan for this site. <br />The permitting process for this site included debate over whether or not an inlet structure, separate from the pond outlet <br />structure was necessary to allow this pit to fill with sediment during flood events. DMG required 100 year flood event design <br />criteria and reclamation bond for installation of the outlet structure. The requirement for design and bonding for an inlet <br />structure was delayed until Grand Junction Pipe (GJP) determined, through consultation with the U. S. Fish and Wildlife <br />Service, whether a separate inlet structure was required. To facilitate this delay in permitting and bonding for the inlet structure, <br />GJP committed to not excavate Phases V, VI, and VII (phases bordering the river channel buffer zone) until the inlet structure <br />engineering designs and reclamation bond were approved by DMG. During this inspection it was noted that the west half of <br />Phase V has been excavated. DMG files do not contain any documentation that the USFWS approved deletion of an inlet <br />structure requirement for this site, nor do they contain designs for a separate inlet structure that is engineered to safely pass a <br />100 year flood. Therefore, the operation is not in compliance with the approved permit. <br />The mining phase sequence proposed in the approved mining plan is not being followed. In 2000 GJP indicated a change of <br />phasing would be forthcoming. The 2000 DMG inspection report for this site indicated that a phase sequence revision should <br />not be a problem as long as those phases along the river were not mined until the inlet issue was resolved and adequate <br />bonding was in place. DMG files do not contain any documentation that a phasing change revision has been submitted. <br />The wetlands study conducted at this site concluded that wetland acreage within the permit area is far less than the amount <br />initially identified in the permit application. The studies were conducted while irrigation was discontinued for a year, showing <br />that a majority of the wetland vegetation and hydrology was irrigation dependent. GJP indicated that the permit would be <br />revised to indicate accurate information regarding wetland locations and acreage based on the studies. DMG files do not <br />contain any documentation that this information has been updated. <br />GJP will need to submit a revision to the permit that addresses the problems noted above, including atamarisk/Russian olive <br />noxious weed management plan, engineering designs and bonding for installation of an inlet thatwill safely pass the 100 year <br />event or documentation from the U. S. Fish and Wildlife Service and Army Corps of Engineers indicating that the outlet can <br />serve as both an inlet and outlet for the pit lake, a new phased mining sequence that is consistent with current excavation and <br />future mining plans, and updated specifics regarding wetlands in the permit area. <br />Most of the pit slopes in Phase II, IV and V were mined over 18 months ago and are not currently in final reclamation as was <br />committed to in the reclamation plan. Some sections were never reclaimed and some have been reclaimed and were then re- <br />affected by deposition of excess overburden to allow for construction of a perimeter road on the river side of the pit. These <br />actions have resulted in an estimated 1000 linear feet of pit slope in excess of that which the state holds bond for reclaiming. In <br />addition, the reclamation plan does not specify that a road will be constructed on in this location. GJP needs to perform <br />adequate reclamation to bring the sequential reclamation in compliance with the reclamation plan or submit a revision to allow <br />for increased reclamation liability and submit an increased financial warranty to coverthat liability (as verified by DMG through <br />
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