4626 HARBOR LN 2018-01-02 MF Import

FIELD REPORT NELSON Project: Fox Residence File No.: 8592B13 GEOTECIINICAL Client: Logan Fox Date: 4/9/2013 ASSOCIATES, INC Location: 4626 Harbor Lane Report No: 02 Everett, WA 17311 135n' Ave. NE NA-500 Weather: Sunny, 50's Page: l of 3 Woodinville, WA 98072 Purpose of (425)486.1669 FAX481-2510 Visit: Construction Monitoring By: LSB/JPH We visited the site today at the request of Logan Fox to observe and evaluate construction activities associated with the Ultra Block wall at the residence located at 4626 Harbor Lane, Everett, WA. AM Visit: Upon arrival, we met with Brian with Ponderosa. We observed that they were beginning to excavate down to the proposed wall subgrade. Brian informed us that western portion of the wall will he approximately 7.5 feet tall and the norther portion of the wall will be approximately 10.0 feet tall. We observed that the southern portion of the block retaining wall foundation extended down approximately 1.5 to 2.5 feet below the existing ground surface in front of the wall. The western portion of the wall exposed exposed light brown fine to medium sand with silt and gravel while the norther portion of the wall subgrade exposed brown gray sandy silt with gravel. We interpreted these soils to be as native glacial deposits. A 4-inch PVC sewer line associated with the neighboring property to the south was encountered within the proposed wall subgrade. This pipe was removed from the wall subgrade and moved to be located in front of the proposed wall. We evaluated the subgrade with a''/• - inch diameter probe rod under moderate pressure. Probing generally yielded penetrations of approximately 1 to 3 inches, which we interpreted as medium dense to dense. However, portions of the wester wall area probed up to 8 to 10 inches which we interpreted as loose. We recommended to Brian that these areas be compacted to an unyielding condition. We will return this afternoon to observe the completed wall subgrade. We also observed a test pit within the approximate location of the proposed drywell. The test pit was excavated down to approximately six feet below the existing ground surface to the southwest of the proposed wall. We encountered fine to medium sand with silt and gravel to the depth explored within the test pit. In our opinion, these soils should be suitable for the proposed drywell system. PM Visit: Upon arrival, we observed that the proposed wall subgrade excavation had been completed. Approximately six inches of 5/8-inch minus crushed rock had been placed within the wall subgrade. The subgrade and the crushed rock were compacted with a vibrating drum roller. We evaluated the subgrade with a '/,-inch diameter probe rod under moderate pressure. Probing generally yielded penetrations of approximately I to 3 inches, xhich we interpreted as nmediun dense to dense and well compacted. In our opinion, the subgrade should be suitable for the wall place 6m. Attachment: Site Plan Signed: _ i Distribution: