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2011-08-04_REVISION - M1999006
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2011-08-04_REVISION - M1999006
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Last modified
6/16/2021 6:12:52 PM
Creation date
8/8/2011 12:30:55 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1999006
IBM Index Class Name
REVISION
Doc Date
8/4/2011
Doc Name
Reply to Preliminary Adequacy Review.
From
Varra Companies, Inc.
To
DRMS
Type & Sequence
TR3
Email Name
MAC
Media Type
D
Archive
No
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c. Inflow is from an existing field irrigation trench leading into the pond at its <br />southeast corner near the estimated location of discharge point DPC <br />located in the northeast corner of Tract C. Outflow is through an existing <br />irrigation gate located in the western end of the pond, at the location <br />shown on the revised extraction plan map. <br />d. Again, this is an old farm pond that historically receives and returns <br />irrigation waters from the farm land now planned for extraction and <br />identified as Tract C. Excess waters are released from an established <br />gate into an established draw where waters could be further directed to <br />irrigate the lower wet meadow pastureland, that is also occupied by <br />wetland species of vegetation, and delineated as wetlands with the Army <br />Corps of Engineers. The waters eventually make their way north to an <br />existing unnamed brook that runs west to east parallel to and eventually <br />emptying into into St. Vrain Creek just as the Creek turns north and <br />crosses Colorado Highway 66. <br />e. The waters have historically been directed into the draw and wetland <br />meadow to the north of the farm pond. We are unaware of any <br />restrictions identified by the Army Corps in this regard. <br />f. The water to be discharged into the farm pond are essentially clear <br />groundwaters pumped directly into either an established or excavated and <br />erosion filtered ditch and into the farm pond. No prior settling is <br />anticipated as necessary at this time. <br />4. The Applicant has not addressed how dewatering may potentially impact the <br />adjacent wetlands in this Technical Revision or in the original submittal. It <br />may be that this information was omitted in the original Reclamation Permit <br />Application since it was not evident if Tract C would be mined at the time of <br />the submittal. In order for the Division to determine that the potential <br />impacts to the hydrologic balance will be minimized, the Applicant must <br />provide additional information demonstrating what the impacts could be and <br />how they will be mitigated. This will likely involve gathering existing data or <br />obtaining new data in order to construct some modeling that will protect the <br />behavior of the surface and groundwater regimes once mining has reached its <br />maximum disturbance. In addition, once these projections have been made, <br />there should be a plan which will quantify the damage threshold that will <br />initiate remedial actions and what those remedial actions will be. <br />At the time of our permitting of the removal and correlated wetland creation to <br />offset removal of the seep ditch in Section 28, C.G.R.S. provided an impact study <br />for any planned extraction of the Tract C area, labeled Tract B, but <br />encompassing the same area. The Tract B area was slightly larger as it didn't <br />July 2011 Technical Revision 3 <br />Varra Companies, Inc. - M- 2009 -006 <br />Kurtz Resource Recovery & Land Development Project Correspondence of 3 August 2011 <br />
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