7010 COLBY AVE 2023-06-01 - Laserfiche WebLink

Mr. Paul Korenovsky ES-6067 June 20, 2018 Page 2 Project Description The preliminary site layout indicates the subject site will be redeveloped with five single-family residences and associated infrastructure improvements. Ingress and egress will be provided by Colby Avenue. Supplementary stormwater management, to accommodate increased impervious surface areas, will likely be achieved through limited infiltration facilities. At the time of report submission, specific building load and grading plans were not available for review; however, we anticipate the proposed structures will be two to three stories in height and constructed utilizing relatively lightly loaded wood framing supported on a conventional foundation system. Perimeter footing loads will likely be 1 to 2 kips per lineal foot, and slab-on- grade loading is anticipated to be approximately 150 pounds per square foot (psf). If the above design assumptions are incorrect or change, ESNW should be contacted to review the recommendations provided in this report. ESNW should review final designs to confirm that our geotechnical recommendations been incorporated into the plans. SITE CONDITIONS Surface The subject site is located approximately 725 feet south of the intersection between Madison Street and Colby Avenue, in Everett, Washington. The approximate location of the property is illustrated on Plate 1 (Vicinity Map). The site consists of two tax parcels (Snohomish County Parcel Nos. 280507-001-025-00 and -026-00) totaling about 0.93 acres. The site is bordered to the north, south, and west by single-family residences and related infrastructure improvements, and to the east by Colby Avenue. The southerly parcel is currently occupied by a single-family residence and outbuilding and is vegetated primarily with grass. A single-family residence previously located on the northernmost parcel has been recently demolished. Site topography is characterized by a slight eastward declivity, with approximately 10 feet of elevation change across the property. Subsurface A representative of ESNW observed, logged, and sampled five test pits, excavated at accessible locations within the site boundaries, on May 15, 2018 using a mini-trackhoe and operator provided by the client. The explorations were completed for purposes of assessment and classification of site soils as well as characterization of groundwater conditions within areas proposed for new development. Previously, on March 20, 2018, Sondergaard Geoscience, PLLC (SGP) completed six exploration pits at accessible locations within the site boundaries. The approximate locations of the explorations are depicted on Plate 2 (Test Pit Location Plan). Please refer to the test pit logs provided in Appendix A for a more detailed description of subsurface conditions. Representative soil samples collected at the test pit locations were evaluated in general accordance with Unified Soil Classification System (USCS) and United States Department of Agriculture (USDA) methods and procedures. Earth Solutions NW,LLC