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OLDEN Tim Wolden, PE,5E <br /> 34930 Hwy 53 <br /> Nehalem,OR 97131 <br /> TRUCTURAL (541)915-6389 cell <br /> (503)368-7962 office <br /> NGINEERING, LLC (503)368-7963 fax <br /> Practical Structural Engineering Solutions timc@woldense.com <br /> September 16, 2024 <br /> Alison Erdman <br /> Ram Jack West <br /> PO Box 11701 <br /> Eugene, OR 97440 <br /> Re: Special Inspection Report for Foundation Repair— Support for the Generator Pad at <br /> the Amazon Facility at 607 Riverside Road in Everett, Washington (Permit#B2405-046) <br /> Dear Alison: <br /> We have verified that the helical piers described in our May 91", repair plan for lifting and <br /> stabilizing the concrete pad that supports an emergency generator at the Amazon Facility at <br /> 607 Riverside Road in Everett have been installed in accordance with our directions. The <br /> bearing had settled by up to 4%-inches at one end causing the fuel tank to give errant <br /> readings. The Owner wanted the foundation pad to be leveled as much as practical to level <br /> the fuel tank and to ensure that the pad was permanently stabilized against any future <br /> settlement. <br /> I had specified the use of four (4) hydraulically driven helical piers to be installed under the <br /> foundation, two on each side. The pier installation was performed by Ram Jack West, <br /> certified installers for the Ram Jack steel piers. The helical piers were started with the <br /> standard guide sleeves and used the low profile 4036 brackets along with sections of steel <br /> angle placed on top of the pads to spread the lifting force. <br /> These piers were driven with the 7k drive head and the installation pressure varied from <br /> 2000 psi to 2500 psi meets the maximum of 5,000 pound capacity stated in the engineering <br /> for the pad and generator. All of these piers went to depths from 5 to 9 feet embedding in <br /> the marine sediment soil or glacial till layer below and have leveled the pad and fuel tank as <br /> much as necessary. An expansive polyurethane was also injected under the pad to fill <br /> voids created by the lift. <br /> In conclusion, the installation of four Ram Jack helical piers under the concrete support pad <br /> for the emergency generator at 607 Riverside Road in Everett, Washington was completed <br /> in a professional and workmanship manner. In all cases the pier installation was conducted <br /> per the Special Inspection criteria listed in the Ram Jack Legacy Report and is in <br /> compliance with my recommendations and the standards of the steel pier industry. <br /> 47 <br /> � �% . ill' • �F(i._ <br /> �yEXPIRE6 6/9/ 2 <br />