My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
2013-10-08_REVISION - C1982056 (22)
DRMS
>
Day Forward
>
Revision
>
Coal
>
C1982056
>
2013-10-08_REVISION - C1982056 (22)
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
8/24/2016 5:32:23 PM
Creation date
10/9/2013 1:27:07 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1982056
IBM Index Class Name
Revision
Doc Date
10/8/2013
Doc Name
Proposed Decision and Findings of Compliance
From
DRMS
To
Twentymile Coal, LLC
Type & Sequence
RN6
Email Name
JDM
DIH
Media Type
D
Archive
No
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
47
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
View images
View plain text
Middle Creek downstream of Routt County Road No. 27 crossing does not meet AVF <br />criteria due to limited farmable acreage, as was also discussed previously. <br /> <br />The alluvial body at the confluence of Foidel Creek and Middle Creek, extending from the <br />County Road No. 33 crossing of Middle Creek upstream on Middle Creek to the first <br />Trout Creek irrigation diversion as depicted on Map No. 15, Water Rights and Alluvial <br />Valley Floors, does meet alluvial valley floor criteria based upon existing flood irrigation <br />and a presumed capability to support subirrigated vegetation. These findings do not <br />address areas further upstream on Middle Creek, as they are not hydrologically connected <br />to the proposed mining operation. The required findings for the identified alluvial valley <br />floor at the confluence of Foidel Creek and Middle Creek are set forth below. <br /> <br /> <br />1.The proposed mining operations will not interrupt, discontinue or preclude farming on <br />the alluvial valley floor. <br /> <br />The mine plan for the Eastern Mining District was shortened from the originally <br />proposed panel length for longwall panels 9R and 8R. Longwall panels in the Eastern <br />Mining District did not undermine the Foidel Creek/Middle Creek Confluence AVF. <br />Proposed longwall panels 6R through 2R in Eastern Mining District presented in PR- <br />04, undermined a portion of Middle Creek; however, the affected portion of Middle <br />Creek is not designated as an AVF. <br /> <br /> <br />2.The proposed mining operations will not cause material damage to the quantity or <br />quality of surface and ground water that supply the alluvial valley floor. <br /> <br />As discussed in the PHC Section of this document, significant dewatering of the Foidel <br />Creek or Middle Creek stream/alluvial systems due to undermining would be <br />precluded by the low vertical permeabilities between the Wadge seam and the alluvia. <br />Stream flow loss to surficial tensional cracks which may develop is expected to be <br />minimal and the fine-grained nature of the alluvium will rapidly fill any cracks that <br />may develop. Furthermore, surface cracking due to subsidence is typically limited to a <br />maximum of 50 feet in depth and direct connection to the workings is not anticipated <br />due to overburden depths in this area in excess of 600 feet. Also, any stream flow loss <br />will be more than compensated by the projected and existing mine discharge to Foidel <br />Creek averaging over 600 gpm. And lastly, the entire Foidel Creek/Middle Creek <br />Confluence alluvial valley floor is flood irrigated by water diverted from the <br />unaffected segment of Trout Creek above its confluence with Middle Creek, nullifying <br />any temporary, minor impacts which could occur. (See TC Life of Mine Application <br />Map No. 15). <br /> <br />The primary function of the Foidel Creek/Middle Creek Confluence AVF is the <br />support of flood irrigated hayland. As previously noted, the flood irrigation water is <br />not diverted from affected segments of either Foidel Creek or Middle Creek, but is <br />diverted from an unaffected segment of Trout Creek. A field inspection conducted by <br />the Division in late August of 1986 observed vegetation on the flood irrigated AVF to <br />be more robust than adjacent areas upstream on Foidel Creek above the Trout Creek <br />irrigation diversion (assumed to be subirrigated). The flood irrigated pasture was <br /> <br /> <br />45 <br /> <br /> Foidel Creek MineOctober 8, 2013 <br /> <br />
The URL can be used to link to this page
Your browser does not support the video tag.