My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
GENERAL45453
DRMS
>
Back File Migration
>
General Documents
>
GENERAL45453
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
8/24/2016 8:14:47 PM
Creation date
11/23/2007 1:51:32 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980005
IBM Index Class Name
General Documents
Doc Date
12/27/2006
Doc Name
Proposed Decision & Findings of Compliance for SL1
From
Phase I
Permit Index Doc Type
Findings
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.
/
20
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
Schedule, Exhibit 13-2. No problems were noted at any of the permanent sediment pond locations <br />during the Phase I bond release inspection. <br />Because the potential exists that the permanent sediment ponds may beout-of-priority at some time with <br />regard to water rights, and that absent a decreed plan for augmentation, SCC will be required to either <br />bypass or release out-of-priority inflows, including lowering the pond water-level elevation to account <br />for out-of-priority inflows that replace evaporative losses. In cooperation with DRMS and the Office of <br />the State Engineer, Division of Water Resources, SCC has committed to installing pumps at Ponds 002, <br />003, and the PECOCO Pond and providing a flexible siphon pipe at both the 004 and 008 <br />impoundments to release out-of-priority inflows, if and when required. The pumps and siphon pipes <br />will be maintained in an operable condition. SCC understands that the Division Engineer has the <br />authority to order the installations of low-level outlets capable of releasing all storage from the <br />structures or breech of the structure(s) to assure that senior appropriators receive the water to which they <br />are entitled by law. As stated in the permanent impoundment demonstrations for the PECOCO Pond <br />and Ponds 002 and 003 (Appendices 7-6g and 7-10 of the PAP), SCC will fully inform private <br />landowners of the State Engineers authority in this regazd. Ponds 004 and 008 are within State of <br />Colorado owned land. <br />The twelve approved permanent Stock Ponds T-4, T-8, T-16, T-17, T-2Q, T-26, T-28, T-29, T-30, T- <br />31, T-32, and T-33 aze all constructed in reclaimed azeas and are not primary sediment control <br />structures. The permanent stock ponds provide water for livestock and wildlife and will enhance both <br />postmine land uses. Stock ponds are routinely inspected during complete inspections. All stock <br />ponds have a capacity no greater than two-acre feet and embankment height no greater than five feet <br />as measured from the invert of the spillway to the upstream toe of the embankment. Stock pond <br />inlets, embankments, and spillway structures are stable. All side slopes and surrounding azeas aze <br />stable and well vegetated. No problems were noted with any of the stock ponds during the Phase I <br />bond release inspection. The stock ponds aze included in the Phase I bond release acreage because <br />they will remain as permanent features. <br />All twenty-three permanent post-mine drainage channels were inspected as part of this Phase I bond <br />release to assess general design compliance. Comparison of the post-mine contour map (Exhibit 12- <br />9) with USGS 7.5 minute Quadrangle Maps of Mount Hams and Milner, Colorado indicate that the <br />major pre-mining drainages were reconstructed in the appropriate locations. Additional drainage <br />density was added to the post-mining landscape by constructing additional post-mine channels. To the <br />extent possible, drainage channels were reestablished to their original natural pattern to minimize <br />erosion, to conserve soil moisture, and promote vegetation. Reconstructed drainages blend well with off <br />site drainage patterns and the drainage density is appropriate and similar to adjacent undisturbed areas. <br />The entire tributary drainage system within the reclaimed azeas has been reconstructed and is <br />functioning, with exception of Channels PM-8, PM-8A, and PM-8B in the East Wadge Pit azea <br />discussed below in this document. All permanent drainage channels were inspected for function with <br />regazd to knickpoints, blending at disturbance boundaries and channel erosion. Channe- gradients <br />were measured at major drainages to evaluate compliance with design criteria. Due to the steepness <br />of the mined azeas, channel gradients were also relatively steep. Channel slopes measured with an <br />12 <br />
The URL can be used to link to this page
Your browser does not support the video tag.