My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
2023-07-05_REVISION - M2021052
DRMS
>
Day Forward
>
Revision
>
Minerals
>
M2021052
>
2023-07-05_REVISION - M2021052
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
7/6/2023 8:41:55 PM
Creation date
7/6/2023 8:32:47 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M2021052
IBM Index Class Name
Revision
Doc Date
7/5/2023
Doc Name Note
Adequacy Review #5
Doc Name
Adequacy Review
From
IHC Scott
To
DRMS
Type & Sequence
AM1
Email Name
ACY
THM
Media Type
D
Archive
No
Jump to thumbnail
< previous set
next set >
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
402
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
Rifle Gravel Pit#1 June 2023 <br /> Size of Area Worked at 30% <br /> The estimated area to be mined (processed and stockpiled) at 30% is approximately 3.67 <br /> acres (depicted in Figure 9, Exhibit C4) and amounts to approximately 88,000 CY of <br /> mined (processed and stockpiled) material. <br /> Size of Area Worked at 60% <br /> The total estimated area to be mined (processed and stockpiled) at 60% is approximately <br /> 5.58 acres (depicted in Figure 10, Exhibit C5) and amounts to approximately 140,000 CY <br /> of mined (processed and stockpiled) material. <br /> • Cumulative area estimated at 60% = 5.58 acres <br /> o Estimated area mined and processed between 30% and 60% = 1.91 acres <br /> • Cumulative volume of material mined and processed at 60% = 140,000 CY <br /> o Estimated volume of material mined and processed between 30% and 60% = 52,000 <br /> CY <br /> Size of Area Worked at 100% <br /> The total estimated area to be mined (processed and stockpiled) at 100% is approximately <br /> 9.90 acres (depicted in Figure 11, Exhibit C6) and amounts to approximately 292,810 CY <br /> of mined (processed and stockpiled) material. <br /> • Cumulative area estimated at 100% = 9.90 acres <br /> o Estimated area mined and processed between 60% and 100% = 4.32 acres <br /> • Cumulative volume of material mined and processed at 100% = 292,810 CY <br /> o Estimated volume of material mined and processed between 60% and 100% _ <br /> 152,810 CY <br /> Equipment <br /> This phase will use conventional mining equipment for this phase, including but not limited <br /> to a long-reach excavator, a bulldozer, track-hoe, screening plant, wash plant, crusher, and <br /> a 35-ton haul truck. <br /> 5.2.3.1 Mining Methods and Earthmoving <br /> This phase of the project will include mining, stockpiling of material for screening, washing <br /> and crushing processes. <br /> • The working surface of the mine will consist of the alluvial gravel surface that is <br /> exposed after removal of the overburden. A long-reach excavator stationed on the <br /> edge of the pit will excavate material to a depth of approximately 20 feet. The pit will <br /> fill with water as excavation proceeds, forming a pond that expands as the excavator <br /> continues to remove material. The pond water will be in direct contact with the water <br /> table of the Colorado River via lateral migration through the underlying permeable <br /> gravels. Excavated material will be piled on the edge of the pond to allow drainage of <br /> free water from the material back into the pond. <br /> • Sideload dump trucks will travel to the pond edge and will be loaded with the dried <br /> material. The dump trucks will transport the dried material from the active excavation <br /> area to the processing facility (800 feet to1,500 feet depending upon the mining <br /> 28 <br />
The URL can be used to link to this page
Your browser does not support the video tag.