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2021-10-19 - Stubenrauch Residence Deck - GEO430211OTTO ROSENAU & ASSOCIATES, INC. Geotechnical Engineering, Construction Inspection & Materials Testing GEOTECHNICAL INSPECTION REPORT Report Number: 430211 Description: Underpinning Installation Project: Stubenrauch Residence Deck Permit Number: BLD2021-1245 Address: 16907 76th Avenue West, Edmonds Job Number: 21-0784 Client: Stubenrauch, Melissa Inspector and Date Remarks Scott Hoobler, Arrived on site as requested to observe the installation of 3-inch diameter hydraulically -driven Grip-Tite PE piers driven into the subgrade to a point of refusal using SPX Power Team hydraulic cylinder jack by 10/19/2021 Robbins and Company at the southwest corner of the residence. The piers were installed to a pressure that did not exceed 21.7 kips or 21,700 pounds as per the project plans and project structural engineer's structural calculations. The piers were installed in 3-foot sections. Listed below are the pier locations (locations corresponding with the approved project plans), depth of the bottom of the existing footing (measured from the adjacent ground surface), the final installation depth (in feet -inch), design load of each pier (pounds), and the final installation load (pounds). The final installation depth is measured from the bottom of the existing footing. Grip-Tite Pier Location Depth of Existing Footing (inches) Final Installation Depth (feet -inch) Final Installation Load (pounds) 1 12 3'-1 " 19,240 2 17 2'-10" 21,164 3 16 2'-11" 21,164 4 17 2'-9" 19,240 5 17 3' 20,202 6 22 7'-6" 20,202 7 24 2'-8" 21,164 The installation of the Grip-Tite Piers was done in accordance with the approved project plans. Copies to: Owner X Contractor Architect X Building Dept. Technical Responsibility: Engineer X Client Anthony Coyne, P.E., Senior Engineer This report applies only to the items tested or reported and is the exclusive property of Otto Rosenau & Associates, Inc. Reproduction of this report, except in full, without written permission from our firm is strictly prohibited. Page 1 of 6747 M.L. King Way S., Seattle, Washington 98118 — Phone (206) 725-4600 — Fax (206) 723-2221 Form No.: ADMIN-100-01 (Rev 01105)