My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
REV100449
DRMS
>
Back File Migration
>
Revision
>
REV100449
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
8/25/2016 1:10:56 AM
Creation date
11/22/2007 12:36:04 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981022
IBM Index Class Name
Revision
Doc Date
3/1/2000
Doc Name
PN C-81-022 REQUEST FOR EXTENSION OF TR 32 DECISION DATE
From
OXBOW MINING INC
To
DMG
Type & Sequence
TR32
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.
/
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
We tentatively decided on a possible location for a well about 150 yards upstream from the ideal <br />spot. (I say "tentatively" because right now its just my opinion and may be discussed further <br />here in the Division.) This location provides several necessazy characteristics. (1) it is down- <br />gradient ofthe portal and nearly all of the new facilities in the canyon: (2) it can be located now <br />and not moved or disturbed during construction; (3) it can be located near the existing <br />streambed, not on a "shoulder" of the canyon bottom, thus improving the chances that the well <br />will be near the topographic low point in the cross-section of the Elk Creek alluvium. <br />A diagrammatic sketch of the area is attached to show the location of the features discussed. <br />It appears [hat a previous hang-up was Tom Anderson's belief that a well in previously disturbed <br />ground would be meaningless. 1 explained that what we need is a record of what happens to the <br />water from the time before construction of the new facilities through operation and up to bond <br />release time. "Disturbed" isn't relevant. If there is groundwater flowing in the alluvium, we <br />need to see how its quantity and quality aze affected by the new facilities. It's doesn't matter <br />whether that groundwater is flowing through "distrubed" alluvium fill or undisturbed. <br />The placement of this well for TR-32 side-steps any issues concerning the alluvium at the mouth <br />of Elk Creek. You can see on the diagram that Elk Creek opens up into a broad flat area now <br />occupied by the Sanborn Creek mine facilities and the town of Somerset. There has been <br />disturbance & activity here for a hundred years. My deduction would be that the groundwater in <br />all the azea underlying that mine/town site -except that direction outside the "mouth" of Elk <br />Creek Canyon - is dominated by the groundwater regime of the North Fork alluvium. It will be <br />very difficult, if not impossible, to separate any effects of Elk Creek groundwater on that <br />dominant system down-gradient of the mouth of the canyon. <br />Another issue that I discussed, although without response from the Oxbow staff, was that it <br />would be very beneficial to both parties if Oxbow would map the alluvium - at least at the site of <br />the well - to provide a cross section of the alluvium-bedrock interface. That would help insure <br />that the well is sited for maximum effectiveness and would also allow Oxbow to calculate <br />groundwater volumes in the alluvium. They might find that useful in the future if a case needs to <br />be made that there is little or no impact. <br />
The URL can be used to link to this page
Your browser does not support the video tag.