My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
1993-03-22_REVISION - M1977378 (2)
DRMS
>
Day Forward
>
Revision
>
Minerals
>
M1977378
>
1993-03-22_REVISION - M1977378 (2)
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
1/26/2021 2:17:00 PM
Creation date
6/15/2012 6:41:32 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1977378
IBM Index Class Name
REVISION
Doc Date
3/22/1993
Doc Name
Submittal- Tunnel Bulkheads for Acid Mine Drainage
From
Sunnyside Gold Corp
To
DMG
Type & Sequence
TR14
Media Type
D
Archive
No
Tags
DRMS Re-OCR
Description:
Signifies Re-OCR Process Performed
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
5
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
TR 14 Submittal <br /> Page Four <br /> Design - Cont <br /> 4) Ignoring bond strength between the rock and the concrete. <br /> 5) Assuming worst case orientation for earthquake loading <br /> for all bulkheads . <br /> 6) Providing additional shear studs on the by-pass pipe. <br /> 7) Ignoring shear resistance provided by the flanges and <br /> couplings to resist the design thrust on the installed <br /> pipes. <br /> For additional conservatism Sunnyside Gold Corporation will also do <br /> the following items not addressed in the design report. <br /> 1) The Brenneman B-Level and Brenneman F-Level bulkheads are <br /> above the existing water table so tightness ( ie water seeping <br /> fractures) could not be evaluated. In addition, neither site <br /> will be accessible after water impoundment is started for <br /> inspection and/or remedial work . To compensate, two identical <br /> bulkheads (built according to the submitted design) will be <br /> constructed 100-200 feet apart. This will provide additional <br /> assurance that leakage will not occur along these pathways. <br /> 2) A limestone barrier from floor to roof will be constructed on <br /> the water side of each bulkhead. While this is probably not <br /> needed, given the sulfate resistant mix and the neutral or <br /> mildly acidic nature of the mine water that will contact the <br /> bulkheads , it is added protection for the bulkhead. <br /> Monitoring <br /> The conceptual plan does not address monitoring but pressure <br /> monitoring pipes will be installed through the accessible bulkheads <br /> (Terry Tunnel and American Tunnel) to track head gain behind the <br /> bulkheads. Seepage conditions will also be monitored at these <br /> sites. The Terry Tunnel pressure and seepage conditions can only <br /> be monitored during summer because of access but by monitoring the <br /> American Tunnel pressure, head conditions at the Terry Tunnel will <br /> be known. It is conceivable that within six (6) months of pipe <br /> closure, field confirmed evaluations/predictions could be made <br /> concerning the success of the plugs and subsequent permanent <br /> closure (ie. pipe grouting, surface reclamation) time schedules <br /> could be set and/or implemented . <br />
The URL can be used to link to this page
Your browser does not support the video tag.