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I ; JUN--22-'93 TUE 07:27 ID:MIRAF I MPLS MN TEL ND:612-473-7203 1t109 P01 <br /> 1330 CI.4 r- . �. <br /> RIRAFI Division of NICOLONCorporation <br /> AUG 3 0 '1993 <br /> June 21, 1993 <br /> Mr. Stephen Spartz Drm 367+ Highway 7 NE_ <br /> Excelsior, MN 55331LECML�-- <br /> ro: Susan Surrey Residence Shoreline Restoration <br /> Dear Mr. Spartz, <br /> As we discussed earlier, the proposed connection of MIRAGRID to <br /> the steel pipe anchorage is better achieved by wrapping the <br /> MLRAGRID under and around the pipe 180 degrees and then Pack <br /> toward the face of the slope a minimum of 3-4 feet. A minimum 2- <br /> 3 inch compacted soil layer should be placed between the two grid <br /> surfaces. <br /> Secondary reinforcement (intermediate layers of MIRAGRID) should <br /> be placed between the primary layers of reinforcement to prevent <br /> slouching of the slope surface and to act as compaction aide at <br /> the face of the slope. The secondary MIRAGRID 'layers should <br /> extend a minimum of 3-4 feet into the embankment from the slope <br /> face <br /> Additionally, Mirafi recommends that a permanent erosion control <br /> mat similar to Miramat 1000 be used to protect the slope face, <br /> since t 111 clop angio will be tfiffl(•uit to Vegetate properly. <br /> The example design has not been checked by Mirafi for external . <br /> internal or global stability. Mirafi recommends that An engineer <br /> eeegi terod in the state of Minnesota and familiar with reinforced <br /> soil design review this design prior to installation_ <br /> Should you have any questions, please feel free to contact me. <br /> Sin erely, <br /> ohn F. Mathews <br /> Regional Product Manager <br /> JM/5m <br /> • <br /> IvliXafi, 15500 Way ara Boulevard, Suite 914, Minneapolis, MN 55391 • (612) 473-6650 • Fax (612) 473-7203 <br />