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Interoffice Memorandum <br />To: Jim Stark <br />From: Zach Trujillo <br />Subject: West Elk— Haul Road Landslide Remediation Review <br />Date: 4/06/2012 <br />Jim — <br />After reviewing West Elk's Haul Road Landslide Remediation submittal, I have the following comments: <br />• Please have West Elk submit a slope stability analysis of the constructed repairs including compaction test <br />results, soil and aggregate material properties, location of phreatic surface and calculated factor of safety. <br />• Please have West Elk submit an as -built earthwork drawing of the east slide. <br />• Please have West Elk show the location of Section A -A as drawn on Figure: 4. <br />Although this may not be necessary for the review of the Haul Road Landslide Remediation submittal, have any <br />additional seeps been located above the current slide? Looking at Drawing No. F -5, Section: Typical Slide Repair, it <br />appears that an additional slide could occur, washing out the section of Haul Road above, if similar conditions exist. The <br />combination of the steep slope (as drawn) with the underlying bed rock could create a similar slide in the future. <br />If you have any questions, feel free to contact me. <br />Thanks, <br />Zach <br />