My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
2004-08-27_REVISION - M1989029
DRMS
>
Day Forward
>
Revision
>
Minerals
>
M1989029
>
2004-08-27_REVISION - M1989029
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
6/16/2021 6:21:21 PM
Creation date
11/21/2007 8:28:56 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1989029
IBM Index Class Name
Revision
Doc Date
8/27/2004
Doc Name
Technical Revision
From
Hart Environmental
To
DMG
Type & Sequence
TR4
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.
/
15
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
topography. Therefore the risk of downstream damage due to potential flooding <br />caused by storm events is negligible. <br />As previously mentioned, in case of severe flooding of St. Vrain Creek, water may <br />spill over the south bank of the creek and flood the reclaimed pits, causing potential <br />erosion of the slope between St. Vrain Creek and the reclaimed azeas. This could <br />potentially lead to rechanneling of St. Vrain Creek through the reclaimed area. In <br />order to prevent washout of the slopes and creek bank, the points where floodwater <br />will likely enter the pits (the low points along the St. Vrain bank) will be protected <br />with trenches constructed along the pit crest, parallel to the creek. These trenches will <br />be flled with riprap, covered and revegetated. In the event of flooding, the trenches <br />will act as energy dissipaters and aid in preventing erosion of the slopes. The locations <br />of the trenches will be determined by the topography at the completion of mining. <br />6.7 Wildlife <br />Some indigenous wildlife species may be temporazily displaced by the proposed <br />mining activities. Following reclamation, it is anticipated that the native species will <br />reestablish. Existing riparian habitat azeas will be undisturbed by the operation. <br />A wildlife questionnaire was previously submitted to the Colorado Division of <br />Wildlife (DOW). <br />6.8 Topsoiling <br />Topsoils in the proposed expansion area are predominantly aquolls, aquents and sandy <br />loam. These soils will be stripped and stockpiled during overburden removal and <br />retained for replacement during site reclamation. Topsoil stockpiles will be protected <br />from erosion and other damage by best management practices. At reclamation, topsoil <br />will be spread over prepared azeas in a 6- to 12-inch thick layer. <br />6.9 Soil Amendments <br />Replaced topsoil will be subjected to agricultural testing for the major plant nutrients <br />(nitrogen, phosphorus, and potassium) prior to revegetation to assess the need for the <br />addition of fertilizer. If test results show a need for amendments, fertilizer with the <br />appropriate ratio of major nutrients will be applied prior to reseeding. NRCS soil <br />fertilizer recommendations, if any, will be followed. <br />srzsrzooa <br />
The URL can be used to link to this page
Your browser does not support the video tag.