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Sep. 29. 2005 1 :40PM Outdoor Excapes No. 1901 P. 2 <br /> KBH CONSULTING, INC. ► � ,: ktflp <br /> Paula Schintnowski.Owner <br /> September 28,2005 <br /> Hans Frees <br /> Outdoor Excapes <br /> 6980 Oxford Street, #100 <br /> St.Louis Park, MN 55426 <br /> RE: Boulder Retaining Wall Construction Evaluation <br /> 1005 Old Long Lake Road <br /> Wayzata, Minnesota <br /> KBH No. 2005.100 <br /> Dear Mr_ Frees: <br /> This letter is being sent at your request to document my observations during a post-construction site visit <br /> of the boulder retaining wall at the 1005 Old Long Lake Road project in Wayzata, Minnesota. 1 <br /> understand that Outdoor Excapes completed the retaining wall in 2004 and that no other work has been <br /> done on the retaining wall since the time of completion. No project specifications, site geotechnical <br /> reports, or construction observation reports were provided to me. <br /> My cursory site observations were performed on September 27,2005_ The following summarizes my <br /> observations during the site visit: <br /> - The retaining wall was approximately 150 feet in length and varied in exposed height from 6.5 feet <br /> to 1 foot. <br /> - A batter/setback of 5°-10°was present. <br /> - The typical size for the structural boulders ranged from 30"-48"diameter near the bottom of the wall, <br /> 18"-30"in the middle courses, and 12"-18"on upper courses. <br /> - A traffic surcharge load due to the gravel driveway was present at the top of the wall approximately <br /> 2'from the back of wall. <br /> - No surcharge loading due to the house was present. <br /> - Level perpendicular slopes were present in front of and behind the wall. <br /> - An embedment depth of approximately 6"appeared to be present. <br /> - Filter fabric was observed at the back of the boulders, <br /> - Wall backfill materials were reported to be well-graded granular sand. <br /> - No signs of wall settlement, bulging,or other distress were observed. <br /> - No signs of wall backfill settlement were observed. <br /> - No signs of foundation soil settlement were observed. <br /> - Most site surface runoff was being directed away from the back of the wall_ <br /> The construction of the retaining wall appeared to be in general conformance with the evaluation that was <br /> KBH Consulting,Inc. <br /> 7226 39th Street North, Suite 100 <br /> Oakdale,MN 55128 <br /> (651)779-7700 <br />