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REV105347
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REV105347
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Entry Properties
Last modified
8/25/2016 1:17:00 AM
Creation date
11/22/2007 1:25:41 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981022
IBM Index Class Name
Revision
Doc Date
6/20/1997
Doc Name
OXBOW CARBON & MINERALS INC SOMERSET & SANBORN CREEK MINES PN C-81-002 FOR TR-29 PHASED MINE EXPANSI
From
TERRAMATRIX MONTGOMERY WATSON MINING GRP
To
DMG
Type & Sequence
TR29
Media Type
D
Archive
No
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<br />• 15. In the last sentence on page 2.04-70, it states that "the wildlife impacts associated with <br />development and operation of the West Malley Fill and associated road are considered minor by <br />the Division of Wildlife." The Division of Wildlife in their letter date November 28, 1995 fist <br />the impact on wildlife as being moderate. Please use the terminology presented by the division of <br />Wildlife. <br />Response: The referenced statement on Project-related wildlife impacts has been revised az <br />noted. Please see accompanying revisions. <br />2.05.3 Operation Plan • Permit Area <br />16. The fifth paragraph down contains a typing error where a zero is left out of the 4,000,000 tons per <br />year statement. <br />Response: The referenced text has been revised to correct the noted error. Please see <br />accompanying revisions. <br />17. Balaz fir Associates, permitting consultant to Oxbow Carbon fir Minerals, lnc., commissioned a <br />report by Lincoln-Devore, Inc. To analyze the geotechnical stability of the West [/alley Fill and <br />the Haul Road, Lincoln-Devore presenu a comprehensive, and candud, review of the proposed <br />plans. The report presents numerous recommendations concerning construction specifications an <br />methodology which it believes should be implemented to ensure stability of the f 11 and the haul <br />road. If these recommendations are adhered to, including appropriate inspection and supervision <br />by qualified geotechnical professional, the pile and road should be stable. However, we could not <br />• identify a specific commitment by the applicant to adhere to these recommendations. The <br />applicant should provide a specific statement of its intention to comply with the <br />recommendations of Lincoln-Devore, lnc. <br />Within the report, Lincoln-Devore, Inc. presents several slope gradient, and cut slope and <br />embankment fill height limit recommendations. At several stations on the proposed haul road, <br />these recommendations are exceeded, such as in the vicinity of the switch back near Station <br />17+00: Lincoln-Devore's report provided a typical analyses of steep slope situations to <br />determine the propriety of proposed foundation/slope preparation and construction techniques. <br />However, the applicant should augment this information with site specific design stability <br />analyses of West [/alley Haul road stations 10+00; 17+00', 27+00; Sediment Pond Road <br />station 15+00; Elk Creek Section station 33+00; and Cemetery Road station 1+00'. <br />Response: Road alignments for the West Valley Haul Road, Sedimentation Pond CLight- <br />Use Road, and Cemetery Road have been revised by Balaz & Associates to minimize <br />cut/fill requirements and limit steep slope segments. Realignment of the Sedimentation <br />Pond CLight-Use Road provides the bench widths specified by Lincoln DeVore and <br />reduces the embankment slope at Station 15+D0. The Cemetery Road alignment haz been <br />modified, resulting in a short segment of 15 percent road between the cemetery and existing <br />water storage tank but eliminating the previous loop around the water tank to access the <br />cemetery az well az the potential stability concern at Station 1+00. <br />Lincoln Devore has analyzed slope stability for the following critical sections of the West <br />• Valley Haul Road: <br />• Stations 8+00 (most critical section -added by Oxbow due to proximity to <br />cemetery) and 27+00 <br />
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