4704 HARBOR LN 2018-01-02 MF Import

From: 03/09/2010 11 13 #302 P.002/007 FIELD REPORT NELSON Project: Anderson Property pile No.: 816909 GEOTECHNICAL Owner: Rick and Ilolly Anderson Date: 02/04/10 ASSOCIATES, INC Location: Everett, Washington Report No: 21 17311 135ri' Ave. NE 9A-500 Weather: Cloudy, 40's Page: I of 2 Woodinville, WA 98072 Purpose of (425) 486 1669 FAX 481 2510 Visit: Wall Installation Monitoring By: BD We visited the site today at the request of Rick and Holly Anderson to observe the removal of the downed trees, installation of erosion control features, and drainage improvements on their property and the adjacent property. We had previously visited die site on a part time basis from Thursday, January 281h to observe the contractors, Ponderosa Pacific, remove many of the downed trees on the Anderson and Leona Chase properties. We observed that the trees and limbs were removed by lifting the trees off the slope using a boom truck, and placing the trees above the wall were the trees were processed and eventually hauled off site. Minimal slope disturbance occurred and no damage to the retaining wall was observed. The removal of the trees exposed another unrelated slide scarp that had been observed previously, but was inaccessible due to the downed trees. We also observed that the contractors had begun to place the erosion control matting in the area of exposed soil in front of die retaining wall. During our visit today, we observed that die contractors had placed most of the erosion control matting directly below the wall, and that tite matting had been secured with metal rebar stakes. The contractors also placed jute netting on the landslide scarp that was lower down the slope and secured the netting with wooden stakes. We also observe the installation of the catch basin approximately 7 feet deep and 10 feet behind the retaining wall, towards the middle of the site (see site plan). The drainpipe that is currently handling all of the stormwater on the site will be directed into the catch basin. A portion of the HDPE pipe that had originally handled the on -site stormwater will be used as tile outlet as the pipe goes through the retaining wall. A new pipe will be placed down the slope in the new drainage casement to a level spreader near the toe of the slope. We also observed that the landscapers had begun to plant the vegetation on the slope and on the bench below tie wall. And with Holly Anderson, we discussed the area behind the wall that will also need to be re -planted. We informed her that we would contact the City to discuss with them the planned native protection area trod maintenance behind the wall. Attachment: Site plan Distribution: Signed: /7