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<br />Since then they have done additional studies this year; had consultati ns with the City's <br />consultant; and performed a detailed investigation of deep drillings d borings. They came <br />up with the conclusion regarding the ancient landslide that it could tentially reform a few <br />inches, but yet was stable. They found with recent slides that only 0 of them needed to be <br />repaired under static conditions. They have since consulted again wi the City's geologist <br />and also with other experts in the field. Their final conclusion from the recent studies was <br />that the ancient landslide would undergo no deformation under seis c conditions and that it <br />would be safe to build on the ancient landslide site as they had pro sed to build. <br /> <br />Mr. Makdessi stated that he feels Terrasearch's conclusion has been ubstantiated by a great <br />deal of study and research. On the other hand he felt the conclusion drawn by staff that the <br />ancient landslide is not completely safe to build upon is unsubstantia <br /> <br />Commissioner Finch questioned whether Mr. Makdessi's research 0 <br />has noted any movement in the last 30 years. Mr. Makdessi replied <br />no movement. <br /> <br /> <br />the ancient landslide <br />t research had noted <br /> <br />Commissioner McGuirk asked Mr. Makdessi about a comment he m <br />soil planes. Mr. Makdessi clarified his remarks and stated that slid <br />stabilize themselves. In recent studies done, they have found no dis <br />anywhere in the area. <br /> <br />e about soil creep and <br />generally tend to self- <br />ct slide planes <br /> <br />Commissioner Michelotti asked Mr. Makdessi to explain the testing <br />conditions versus non-drought conditions. Mr. Makdessi stated they <br />equipment this year which measured ground water depths. They al <br />in their measurement of ground water in 1988. He noted that groun <br />not changed significantly during that period. <br /> <br />one in drought <br />nstalled certain <br />installed this equipment <br />water conditions have <br /> <br /> <br />Commissioner Wright expressed concern that several years of torren rainfall rather than <br />several years of dry weather might change the findings. Mr. Makd si explained they would <br />have to have many, many years of very heavy rainfall that might ch ge the ground water <br />level before the slide plane would be affected. In addition, the soil mpaction on the site is <br />such that it would take many years for rainfall to have an affect. <br /> <br /> <br />pies were taken on the <br />of the ancient <br /> <br />Chairman Hovingh questioned Mr. Makdessi as to where the bore <br />site. Mr. Dommer replied that the bore samples were taken at the t <br />landslide area; also at the top of the property; and about mid-way up <br /> <br />Chairman Hovingh further questioned Mr. Makdessi extensively abo t sheer testing on wet <br />or damp material, on cohesive values and strengths, and other rela issues. <br /> <br />Mr. Smith introduced Dr. Robert Pike, noting that Dr. Pike was call in when Berlogar and <br />Mr. Makdessi disagreed on their findings. At that point they felt the needed more <br /> <br />Planning Commission Minutes <br />November 11, 1992 <br /> <br />Page 6 <br />