330 ELM ST VIEW RIDGE ESTATES 2022-04-04

• ,_ NELSON GEOTECHNICAL �A ASSOCIATES, INC. GEOTECHNICAL ENGINEERS & GEOLOGISTS Main Office Engineering-Geology Branch 1731 1—135th Ave NE,A-500 5526 Industry Lane,#2 Woodinville,WA 98072 East Wenatchee,WA 98802 (425)486-1669•FAX(425)481-2510 (509)665-7696• FAX(509)665-7692 March 22,2019 Mr. Tom Gish . J uE Port Gardner Property Management, Inc. 2907 Hewitt Avenue JUN 0 3 2021 Everett,Washington 98201 CITY OF EVERETT Geotechnical Engineering Evaluation Permit Services View Ridge Estates 330 Building Settlement 330 Elm Street Everett,Washington NGA Project No. 1085419 Dear Mr. Gish: We are pleased to submit the attached report titled "Geotechnical Engineering Evaluation — View Ridge Estates 330 Building Settlement — 330 Elm Street — Everett, Washington." This report summarizes our observations of the existing surface and subsurface conditions in the areas of the existing foundations and provides our opinions on the potential causes of settlement and settlement related distress in the building foundations, as well as repair recommendations and review of the existing settlement remediation plans. Our services were completed in general accordance with our proposal, which was signed by you on January 22,2019. We initially visited the site on January 18, 2019 to observe current conditions. The site is occupied by three multi-residence condominium structures, which are known as the View Ridge Estates. The subject condominium structure is situated within the northeastern portion of the site. The ground surface within the site is gently sloping from southwest to northeast. The 330 structure is surrounded by grass-yard and landscaping plants. We understand the building has been experiencing ongoing settlement issues. Based on a report generated by CG Engineering, the eastern side of the building has experienced settlement on the order of 3.0 to 4.9 inches. Additionally, we observed photos of cracking interior drywall, sticking doors, and cracks in exterior brick veneer. We have been requested to perfoiiii a geotechnical evaluation within the vicinity of the settling structure in order to provide recommendations for any needed foundation support improvements as warranted. We performed four geotechnical borings and four hand-tool soil explorations extending to depths in the range of 31.5 to 36.5 feet and 3.0 to 8.2 feet, respectively. Our explorations indicated that the existing eastern portion of the structure is generally underlain by approximately 6.0 to 11.5 feet of undocumented fill soils in varying density conditions with competent native glacial soils at depth. Due to the overall thickness and varying nature of the undocumented fill interpreted to underlie the building foundations, it is our opinion that the undocumented fill soils may have contributed to the observed settlement and distress that has been observed. Without foundation improvements, the settlement and settlement-related distress are likely to continue. To limit future settlement, we generally recommend the structure 1 2�