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20100311085824137.pdfFebruary 1S, 2005 Ms. Jeannine Graf City of EdmoDds 121 50' Ave N, Edmonds, WA 98020 DELIVERED BY FACSIMILE: 425-771.0221 Dear Ms. Graf: I '�' / t:11 fA Y �;, F I L E Another mudslide/debris flow has occurred on the west slope between the Sequoia Ridge Plat and the Lorian Woods Plat. Again, there is water seepage emergirig from the slope 30 to 35 feet below the top of the slope beyond the property line of the Sequoia Ridge Development in the middle of the slide area. This is now the third such incident since December of 2001, where mudflows/slides have occurred and water seepage is evident. As determined by both Landau Associates and GeoGToup Northwest the seepage observed at the base of all these niudflows is in the vicinity of the City of Edmonds storm drain system on the slope between Sequoia Ridge and Lorian Woods. The City of Edmonds required that I retain a geotechnical engineer after the slide on December 16, 2001. Our engineers clearly pointed out to the City of Edmonds that: 11 the City and private seepage collection and drainage system must be maintained on a regular basis." The recommendation further stated: -a new seepage collection system be installed where the water seepage emerges. Filter fabric and crushed rock needs to be placed where the water seepage emerges and new catch basins and drains should be installed to capture the water and minimize erosion of the slope." The en&eer goes on to say: 11 if these measures are not implemented the rate of bank recession could be faster than anticipated." The recommendations of the geotechnical engineer have never been implemented. The storm chain system between Sequoia Ridge and Lorian Woods has not been maintained. Over the past year there has been clearing activity on Lorian Woods property below the Bosch house in Sequoia Ridge where these drain systems could have been further compromised. These slides as indicated by professional geotechnical engineers are occurring from the bottom up as opposed to the top down, Water seepage from the slope is causing erosion and undermining the slope above the seepage area thus causing the slides and mudflows. The developer of the Lorian Woods project has indicated to the City of Edmonds that water seepage catch basins and related drain pipes have been taken out and never replaced. Due to the fact that this in now the third occurrence of debris/mudflow in the vicinit), of the City's storm drain system on the Lorian Woods property and the fact that none of die recommendations of the geotechnical engineer have been completed after the December 16, incidence, I am requesting a timetable by the City of Edmonds as to when the storm drain, system will be repaired/replaced or a new system installed as recommended by the geotechnical engineer. I will await your response. Should I not receive an adequate response within the neat 10 days, I will Band this matter over to legal counsel for hnrnediate action. Sincerely, ohn E noresen 16 72"d Ave W. Edmonds, WA 98026 CC. Mx. Phil Ijolroyd, 16120 72nd Ave W. Mr. John Johnson, 16122 72"d Ave W. Mr. Jim Bosch, 16116 72nd Ave W. Duane Bowman, Director of Development Services Dave Gebert, City Engineex