4330 HOYT AVE 2022-03-01 - Laserfiche WebLink

• r ILLl.I.1 icn rvn I NELSON Project: Staniford Residence File No.: 11485B20 Underpinning GEOTECHNICAL Owner: John Staniford Date: 8/4/2020 ASSOCIATES,INC Location: Everett, WA Report No: 2 17311 135T11 Ave.NE#A 500 Weather: Sunny, 70's Page 1 of 2 Woodinville,WA 98072 Purpose of • (425)486-1669 FAX 481-2510 Visit: Construction Monitoring By: KSB Wenatchee,WA 509 665-7696 We visited the site today at the request of John Staniford to provide geotechnical consultation and construction monitoring services for the Staniford Residence Underpinning located at 4328 Hoyt Avenue in Everett,Washington. Upon arrival to the site we met with John Stanford and the pile contractors from Advanced Foundation Supports to discuss the days plans. We observed the installation of pin piles per the plans. We were informed that measurements slightly differed, and as such the piles were evenly spaced and two additional piles were added. The piles to be driven consisted of 2-inch diameter, schedule 80, steel pipe, in 5'3" and 10'6" sections that were connected with internal slip couplers. The piles were driven to a refusal criteria of less than one inch of vertical movement in 60 seconds of continuous driving with a 140-pound Rhino Heavy Duty Post Driver. We monitored as each of the pin piles were driven to refusal. The depths of refusal and corresponding pile numbers are listed in the table below. The depths are measured from the existing ground surface. The locations of the pin piles can be found on the attached site plan. Pile Number Pile Embedment(feet) P4 18.5 P35 i 17.5 P13 P15 20.5 P5 26.2 P6 3 27.9 P16 15.2 P17 17.8 • P7 Driven,Not Finished P18 17.9 P19 — 15.5 It is our opinion that the test piles were adequately installed and driven to refusal in accordance with our recommendations. We will continue to monitor the site during pile installation. Attachments: Site Plan Signed: Distribution: Katelyn Brower, GIT 3 1