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georgerobinson@r2incorporated.com <br /> From: David McLay <davidmclay@comcast.net> <br /> Sent: Monday,June 02, 2014 11:20 AM <br /> To: georgerobinson@r2incorporated.com;Oliver Wesley; pgchang@opalgroupinc.com <br /> Cc: Michael J.Taylor, 'Erich Rauber' <br /> Subject: Road Surface Material Change Request and Retaining Wall Design Revisions <br /> George,Oliver, Paul: <br /> Two Things- <br /> 1. Road Surface material: Michael Taylor of Opal Group requested a change in the road surface material from the <br /> 2"-minus crushed rock to a 3"-minus aggregate base course material,due to availability. I approved the change <br /> —the 3"-minus material is what CDOT recommends for pavement sub-base. <br /> 2. Retaining Wall Design Revisions: Based on the considerations included in the MSE Wall Design Revisions <br /> memorandum (to be provided), I have directed Michael Taylor to place rip-rap in front of the Gravity Wall <br /> section of the Retaining Wall(Station 19+12 to Station 19+04)to a minimum of 3 feet above the base of the wall <br /> at Elevation 8,621 feet. This rip-rap will be an extension of the rip-rap to be placed at the outlet of the retention <br /> pond pipe (invert Elevation 8,625.3 feet). Rock for the rip-rap is currently available onsite from existing material. <br /> David S. McLay <br /> 3051 E. Peakview Circle <br /> Centennial,CO 80121 <br /> 303-210-6144 <br /> davidmclav@comcast.net <br /> 1 <br />