500 LAUREL DR 2016-01-01 MF Import

� Cre�tive �ngineering Options �Nc. A firm practicing in the geosciences February 23, 2d02 Mr. Shawn & Ms. Kathy Hoban 500 Laurel Street Everett, Washington 98201 Subject: Final Monitoring Re�ort Foundation Construction Residential Addition 500 Laurel Street Everett, Washington [City Plan Check No. CC107010] Dear Mr. & Ms. Hoban: 00-2267-1 As requested, we have provided geotechnical construction monitoring services related to the installation of a series of foundation supporting driven-in-place steel pin-piles around the perimeter of the residential addition at the subject site. The primary purpase of our services were to verify that the pin-piles were driven in accordance with the original project specifications and to the appro�riate refusal criterion, and to verify their allowable axial load capacity. For informational purposes we have provided copies of our Field Construction Inspection Reports as an attachment to this letter. Your subcontractor, McDoweil File f<ing, Inc., installed a total of thirty-five (35) pin- piles; thirty-three two inch [nominalJ diameter and two [piles 31 and 32] four inch diameter piles. The two inch piles consisted of segments of Schedule 80 "strong" black iron pipe and the four inch pipes were of Schedule 40 material. Where appropriate, the segments of pile were connected with a"force-fiY' connector. These pin-piles were driven to bearing depths of between approximaxely 7' - 6" and 16' - 0" below the foundation subgrade elevation. The pile� were driven either N�ith an air compressor operated ninety (90) pound jack hammer or a small trackhoe mounted six hundred and fifty (650) pound hydraulic hammer. After installation our representative monitored the proof testing of virtualiy all of the installed pin-piles. This proof testing involved each pile baing redriven for one full 541 A 159th Place NE • Redmond, WA 98052 •(425) 863�6589 • FAX (425) 867-9664 • www.ceogeo.com 1I�