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PERMIT #: M- 1977 -193 <br />INSPECTOR'S INITIALS: TC 1 <br />INSPECTION DATE: June 20, 2013 <br />ensure that slope failure or raveling erosion will not move beyond the permit boundary. Additionally, care <br />should be given to leave the final highwall in a condition that will minimize local failures and rockfall from the <br />highwall face. <br />The contact between the Precambrian gneisses and the sedimentary strata to the east is of particular concern, <br />since this contact is known to be a weak zone prone to failure both along the contact strike, and also across the <br />bedding plain as evident in the failure in the quarry to the north of the site, and the smaller -scale failure onsite <br />north of the area currently being mined. The final highwall design along areas were this contact will be exposed <br />will need to include more conservative evaluation and design. <br />On -going slope stability monitoring of the highwall should be conducted following the final configuration for <br />each mine phase. The monitoring should continue until there is reasonable evidence that the section of highwall <br />is in a stable configuration, which will depend on the geology, topography, highwall orientation, and observed <br />conditions in the monitoring data, likely a minimum of 5 years. <br />PHOTOGRAPHS <br />Photo 1. The seep area (yellow circle). <br />Page 3 of 8 <br />