4600 BAKER DR Geotech Report 2025-03-03

Cobalt Geosciences,LLC ' COBALT P.O.Box 82243 '`�� G E O S C I E N C E S Kenmore,Washington 98028 January 12, 2021 8 0 U E 1 Bernardo Hidalgo Behidalgo84@gmail.com r MAY 1 g 2021 RE: Limited Geologic Evaluation Existing Residence—Proposed Additions CITY OF EVERETT 460o Baker Drive Permit Services Everett,Washington In accordance with your authorization, Cobalt Geosciences, LLC has prepared this letter to discuss the results of our limited geologic evaluation of steep slope areas near the above- referenced location. The proposed construction includes interior remodeling, a new or extended deck, and small additions to the south side of the building. We understand that the deck may extend closer to steep slopes than the existing residence. Site Description The site is located at 460o Baker Drive in Everett, Washington. The site consists of one irregularly shaped parcel(No. 00417400001400)with a total area of 3.56 acres. The southeast portion of the property is developed with a multi-story residence with shallow basement, accessory structures,driveway,and patio areas. This portion of the site is nearly level to slightly sloping downward to the north and west and vegetated with grasses, bushes, shrubs, and variable diameter trees. Figure 1 shows the area of the residence and site topography. The remainder of the property is undeveloped and vegetated with ferns, ivy, blackberry vines, Salal,understory,and variable diameter Cedar,Alder,Maple,and Fir trees. From the area of the residence and yard areas (generally level areas), the site slopes steeply downward in multiple directions. The northern portion slopes downward to the north at magnitudes of 7o to 15o percent and relief of about 15o feet. The western portion slopes downward to the west at magnitudes of 5o to 14o percent and relief of about 14o feet. There are similar slopes extending downward to the southwest near the south property line. All of the slope areas are well vegetated; however, the north facing slopes are predominately covered with low-lying deciduous vegetation (blackberry vines, ivy, ferns, grasses, small trees) with less large diameter evergreen trees. There is local evidence of historic landslide activity along portions of the north-facing slope. There is a stream near the west property line at the toe of the west-facing slope. This slope is well vegetated with trees and understory. The site contains steep slope/landslide and erosion hazard areas. The site is bordered to the east, south, and west by residential properties and to the north by railroad right of way and Puget Sound. www.cobaltgeo.com (206)331-1097 ZS