My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
2017-07-11_PERMIT FILE - C1981019
DRMS
>
Day Forward
>
Permit File
>
Coal
>
C1981019
>
2017-07-11_PERMIT FILE - C1981019
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
5/11/2020 5:16:18 PM
Creation date
8/28/2017 8:02:21 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981019
IBM Index Class Name
Permit File
Doc Date
7/11/2017
Section_Exhibit Name
Exhibit 07, Item 14 Collom In Pit Drilling Small Area Exemption Demonstrations
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.
/
19
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
The drill road has 0.2 acres of disturbance, 18.8 acres of contributing watershed, and a ground <br />slope for the contributing watershed of 11 %. A curve number of 85 was utilized to reflect the <br />disturbed condition of the drill road and a curve number of 63 was used to reflect the undisturbed <br />condition of the contributing watershed. <br />This demonstration utilized the Manning's roughness coefficient of 0.0054, and a stem spacing <br />of 0.86 inches. These inputs are intended to reflect that the native grass cover density adjacent to <br />the drill roads. The 0.13 cfs flow was then run through a native grass filter approximately 692 <br />feet in length (road length) and 10 feet in width (direction of the flow through the grass filter). <br />As shown in the attached SEDCAD output files, the calculated resulting peak settleable <br />concentration released and the 24 -hr weighted settleable solids concentration is 0.00 ml/1, well <br />below the effluent standards of 0.5 ml/1, and a 97.1 % trap efficiency. <br />Exh. 7, Item 14, Page 2 Revision Date: 5/22/17 <br />Revision No.: MR -174 <br />
The URL can be used to link to this page
Your browser does not support the video tag.