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REV08604
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REV08604
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Entry Properties
Last modified
8/25/2016 1:09:11 AM
Creation date
11/21/2007 9:55:03 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1977129
IBM Index Class Name
Revision
Doc Date
9/3/1999
Doc Name
WHITEWATER 500 PIT M-77-129 ADEQUACY REVIEW RESPONSE
From
ENVIRONMENT INC
To
DMG
Type & Sequence
AM2
Media Type
D
Archive
No
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ENVINOHMENT, IN G. • • PAGE 2 <br />SEPTEMOER 7, 1949 <br />honored tradition as they have a good working relationship with <br />their neighbors. The maps show all permanent manmade structures <br />and the owners on. Map Exhibits Cn and Ca-as required by Rule <br />6.4.3(g). Thanks for the reminder. <br />6. It is shown on the Mining Plan North Area - Map Exhibit C-ln Note <br />how the map shows that the slopes along Coffman Road are eloped <br />3:1, so if mining ended prematurely no additional work would be <br />necessary. Thank you for your recommendation on the mining <br />method along the road. we realize that we will be responsible <br />for any damage to the road as well as for disturbing area outside <br />our permit if our method of.mining causes damage. <br />We have no idea at this time where we will stockpile topsoil or <br />what direction we will mine within each stage. That will depend <br />on the site conditions, depth of material,-amount of topsoil <br />actually encountered and the demonda for moteriel at the time <br />mining takes place. In general we will stockpile topsoil along <br />the setbacks around the mined Brea. Showing their location will <br />only confuse thing later if we decide to change their location. <br />Our experience on the areap mined south of the river indicate <br />that initially we have to atoek pile soil initially, but reach a <br />time in each stage when we begin to replace it on completed <br />slopes as i't is stripped. we do not expect any changes on the <br />north area. As for the direction of mining on the north area we <br />will work away from the north side of Stage 3-Part A in a counter <br />clock wise direction. Map Exhibit~C-ln and C-la ahowa this in <br />the partially mined areas in Stages 3 - Part A, 3 - Part B and 4 <br />- Part A. In Stage 2 - Pert B, we will mine up stream from north <br />to south. <br />8. This was intended to be an average depth for the area along the <br />river and was based on holes dug with a backhoe. The conditions <br />we find now have changed and the gravel varies from 10 to 30 feet <br />deep on the entire site'. we are directed by state law to moxi- <br />mize the extraction of moterial from the mine and have mined to <br />the bottom of the reserve and can now depict the actual condi- <br />tions instead of the thegretical.thickness stated in 1977. <br />Remember that we are working with 5 foot contours on these maps <br />and show the depth a's 25 feet (existing text 4'+15'19'). We <br />feel the maps accurately ahowa how deep we think the mined area <br />will eventually be and our reclamation plan addresses how we will <br />reclaim the slopes no matter the depth of the mining. <br />9. Thank you for your recommendation. We will take it under advise- <br />ment. Remember we are reclaiming .the lake Brea on this site as a <br />private recreation area and any wildlife habitat created will be <br />incidental to our final use. The rest is being reclaimed as work <br />area and feed areas. <br />10. Our practices include all three methods of creating slopes de- <br />pending on what we encounter as mining progresses. Currently in <br />Stage 2 - Part A we are mining neariy vertical end plan to <br />backfill the elopes will excess overburden found on the site. <br />This ie laid in and compacted using earth moving equipment normal <br />to fill construction. Our experience in Stage 1 ahowa that this <br />equipment compacts the fill material adequately'so that when <br />water refills the lake the elopes remain stable. The material is <br />not stockpiled as it is removed from the area to be mined next, <br />
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