1707 SCENIC DR Geotech Report 2022-10-25

t�+1• Snohomish County Public Utility District No,1 March 31,2015 Page 4 The grids shall be placed with the highest strength axis perpendicular to the wall face.The geogrid shall be laid horizontally on compacted backfill and attached to the Sierrascape facing unit per the details in the project plans.The geogrid shall be pulled taut and anchored prior to backfill placement on the geogrid. Wall Embedment The base of the wall and finished grade in front of the wall should be in accordance with the elevation in the project plans.A minimum embedment of 1.5 feet is required as part of the MSE wall design. • Fencing An impasse fence will be placed along the top of the new retaining wall at an offset of about 5.5 feet.The foundation elements or sleeves for future installation of the fence should be installed during wall construction per notes on typical section and manufacturers recommendations. LIMITATIONS We have prepared this letter as an addendum to our October 24,2014 report and for the exclusive use by Snohomish County PUD No.1 and their authorized agents for the design of the MSE wall at the northwest corner of the site (Retaining Wall 2)for the proposed Beverly Park Substation Expansion project site in Everett, Washington. This letter is subject to the same Limitations and Guidelines for Use presented in Appendix D of the aforementioned report. Within the limitations of scope,schedule and budget,our services have been executed in accordance with generally accepted practices in the field of geotechnical engineering in this area at the time this report was prepared.No warranty or other conditions,express or implied,should be understood. Any electronic form,facsimile or hard copy of the original document(email,text,table and/or figure), if provided,and any attachments are only a copy of the original document. The original document is stored by GeoEngineers, Inc.and will serve as the official document of record. Please contact us if you need additional support. Sincerely, +..., GeoEngineers, Inc. `' C., Braydan P.DuRee, PE ! ►` ;* y�„ ,�/, Geotechnical Engineer AV Ay•rir 11 Robert C.Metcalfe, PE, LEG • Principal BPD:RCM:nld cc: Garrett Moak,PE Leidos.(one copy sent via email) Disclaimer:Any electronic form,facsimile or hard copy of the original document(email,text,table,and/or figure),if provided,and anyattachments are only a copy of the original document.The original document is stored by GeoEngineers,inc.and will serve as the official document of record. GEOENGINEER S File No.0482 027.02