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GENERAL43193
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GENERAL43193
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Entry Properties
Last modified
8/24/2016 8:11:58 PM
Creation date
11/23/2007 12:15:13 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1996083
IBM Index Class Name
General Documents
Doc Date
6/22/1998
Doc Name
GOB Pile HAUL ROAD CERTIFICATION
From
J E STOVER & ASSOCIATES
To
DMG
Permit Index Doc Type
ROADS
Media Type
D
Archive
No
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<br />BOWIE RESOURCES LIMITED <br />Bowie No. 2 Mine <br />Gob Pile Haul Road Certification <br />This haul road begins at approximately station 5+00 on the haul road to the portal <br />bench and traverses along the old railroad bed that was used by the old King Mine <br />loadout. The haul road segment is approximately 3200-feet long and provides access <br />to the gob pile and to sediment ponds C and D. The first 12000-feet of the haul road <br />was certified by the undersigned on January 9, 1998 (= station 100+00 to station <br />120+00). Refer to Map No. 16, Haul Road Plan & Profile, Gob pile. The first 2600-feet <br />of the haul road is shown of Map No. 16 and the last 600-feet is presented on Map <br />95266-05 in Volume IV. <br />In accordance with Rule 4.03.1(1)(d)(i), this certification has been prepared to certify <br />the gob pile haul road has been constructed as designed and in accordance with the <br />approved plan. <br />Approximately 2400-feet of this haul road traverses an old railroad grade. The road <br />embankment was not actually constructed or reconstructed. This road embankment is <br />considered to be an existing haul road not within the disturbed area for which <br />construction or reconstruction was complete prior to August 1, 1995. In this case, the <br />Operator is to provide a relevant showing, on a case by case basis, which may include <br />monitoring data or other evidence, whether or not the road meets the performance <br />standards of Rule 4.03.1. The road grade meets the requirements of 4.03.1(3)(a) <br />vertical alignment. Road cut and fill slopes are not uniform and do not meet the <br />performance standards in all areas. Some of the cut slopes are steeper than i.5h:1v <br />and some of the fill slopes are steeper than 2h:1v. However, the DMG can approve <br />steeper slopes if certain factor of safety values are demonstrated by geotechnical <br />analysis. Although no geotechnical analysis is provided, stability of the haul road <br />should not be a concern. The roadbed has functioned as a railroad subgrade for many <br />years up through the mid 1970's. The roadbed and cut and fill slopes are stable and <br />have been stable for many years. A loaded rail car puts 6 to 10 times more load on a <br />roadbed than a 10 wheel gob haul truck. There are no springs or water seeps along <br />the roadbed that might compromise the stability of the haul road. This road has been <br />stable for many years under severe loading conditions. Therefore, it is logical to <br />conclude that the cut and fill slopes do have a suitable factor of safety and the road will <br />be stable for may years to come. <br />The permitted configuration of the haul road is a 20-foot wide roadway with an earth <br />and rock safety berm on the outside slope and a drainage ditch on the inside. Over six <br />inches of gravel surfacing was placed and compacted on the first 2,000-feet of the haul <br />road during the first full week of January 1998. The remainder of the haul road was <br />surfaced with gravel during the second week of June 1998. A portion of the new <br />section of haul road is narrower than 20-feet (15'±) and lacks a safety berm. <br />
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