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HomeMy WebLinkAbout7945.04 E 2023 0517AEarth Solutions NWLLC 15365 NE 90th Street, Suite 100 Redmond, WA 98052 Main (425) 449-4704 | Fax (425) 449-4711 www.esnw.com FIELD REPORT Project No. 7945.04 Page 1 of 2 Report ID 7945.04 E 2023 0517A Date Wed 5/17/2023 Weather 70°F Clear Arrival/Departure Time(s) 11:30AM; 12:45PM Travel Time (hr) 1.0 Project Name Canopy Property Location 4130 Lincoln Ave NE, Renton ESNW Rep. & Phone Willem Scherwin | 206 793 8569 Client Info/Contact Century Communities | Stacia Bloom General Contractor Info/Contact Contractor #2 Info/Contact Reviewed By LAC Initials/Date RAC Initials/Date Field Supervisor Project Manager Limitations: The presence of our field representative at the site is to provide our client with a source of professional advice, opinions, and recommendations based upon the field representative’s observations and testing of the contractor’s work. Our services do not include supervision or direction of the contractor, their employees, or agents. Geotechnical recommendations for obtaining project objectives may be made by our representatives; however, direction of the actual work should come from the owner or contractor, as appropriate. The contractor is responsible for complying with the contract documents at all times, regardless of the presence of our field representative. Jobsite safety, including compliance with all applicable state or federal regulations, is the sole responsibility of the contractor. The observations, recommendations, and conclusions provided in this field report are preliminary until reviewed by the ESNW project manager. ESNW rep was onsite to observe Redi-Rock wall foundation keyway. Wall Keyway Observations While onsite, ESNW rep observed the contractor cutting a wall keyway approximately 6 feet in width into native grey sandy silt with gravel. ESNW rep used a ½” steel T-probe to probe the keyway and observed it to be very dense, firm, unyielding, and suitable for the construction of the proposed wall. ESNW rep observed the contractor placing Redi-Rock wall blocks along the keyway that has been capped with 5/8th inch minus. Rep observed the contractor had placed a 4” corugated drainage pipe behind the wall and backfilled it with pea gravel. Some groundwater at the base of the keyway was observed, as well as layers of interbedded sand with gravel and cobbles in some areas of the exposed near vertical cut. ESNW rep recommends segmental wall construction in coordination with keyway/temporary excavation. In this respect the contractor can excavate the bulk of the soil to approximatly 1H:1V to 0.75H:1V, but the near-vertical keyway and over-steepened (0.5H:1V) transitions ahall be completed in 20’-30’ linial sections of exposed cut at a time. Once the lower six feet of wall is constructed the excavation can progress laterally. Please see attached site plan illustrating wall construction area. Report ID 7945.04 E 2023 0517A Page 2 of 2 Earth Solutions NW, LLC Wall Construction/Keyway