Laserfiche WebLink
Page C -2 of 4 <br />Deformation /Stability <br />Deformation and stability will be monitored through the installation of inclinometers and mirrors. <br />The inclinometers will be installed along the centerline of the pile alignment in the intermediate <br />benches at the approximate locations shown on Figure C -I (INC -1, INC -2, and INC -3). The <br />inclinometers will be located near piezometers PZ -3, PZ -5, and PZ -8. The inclinometers will be <br />extended at least 10 ft into bedrock. <br />The mirrors will be located along the centerline of the pile alignment as shown on Figure C -1. The <br />movement of the mirrors will be monitored from a total station /bench mark set on firm ground (not <br />usually susceptible to movement). Mirrors will be installed after soil cover has been placed. <br />The inclinometers will be installed as construction of the refuse fill (including soil cover) proceeds <br />and read quarterly for the first five years. The mirrors will also be installed as construction of the <br />refuse fill (including soil cover) proceeds and read quarterly for the first five years and twice a year <br />thereafter. <br />Geotechnical Properties of RPE East Refuse Material <br />The properties of the coal refuse to be placed in the RPE East were assumed to be similar to those <br />produced during the initial operation of the Coal Preparation Plant (CPP). With time, the <br />characteristics of this material may vary slightly due to changes in source material, changes in plant <br />processes, different placement techniques, and weathering after placement in the pile. These <br />characteristics will be measured by way of a geotechnical testing program. The geotechnical testing <br />program will include the following: <br />• Moisture content (10 tests each event, ASTM D- 2216)* <br />• Grain size with hydrometer (10 analyses each event, ASTM D -422)* <br />• Atterberg limits (10 analyses each event, ASTM D -4318 )* <br />• Specific gravity (3 analyses each event, ASTM D -854)* <br />• Unit weight (10 tests each event)* <br />Revised July 21, 2011 <br />PAMpls \06 CO\26 \06261003 RPE E Permit Mod Support\WorkFiles \Permit Application\Appendix C Monitoring Plan\App C Monitoring Plan <br />2011- 07- 21.doc <br />