2107 55TH ST SE 2019-01-30 - Laserfiche WebLink

to better infiltrate the flow from the driveway and houses. The driveway pavement will slope to a catch basin in the driveway and the catch basin will drain to a 21'x2'x2' infiltration trench. The house downspouts will drain to a 561f x 2' x 2' infiltration trench. The site is located on Parcel 00495800701003. The site address is to be determined This project will pave 2,226sf of existing brush and ivy with pavement or roofs The project proposes to construct a new 1,838sf Single Family Residence and a 699sf driveway. See site plan. Section 3 Existing Site Condtion The site is currently vacant and covered with grass and ivy with some trees. The soils are sandy. There is a steep slope going down to the east of the site. The alley serving the site is gravel.No offsite flows appear to enter the site. Section 4 Adjacent Areas To the north and east of this site is the Pacific Northwest Traction Company Right of Way and Substation,to the south is Lot 2 which will also be developed into a SFR and another SFR and Lowel Road. To the west is the gravel alley and a single family home. Section 5 Critical Areas There is a steep slope to the north and east of the site. Section 6 Soil Per the SCS Soil Map the soils in this area are Alderwood(5)with moderate erodibility but the Anstey Engineering Soil investigation found the soils to be medium sands. Section 7 Potential Erosion Possibility As the site is moderately to steeply sloped there is some possibility of erosion. However this is a small site with limited clearing and pervious soils so there should not be enough surface water to cause any significant erosion. The silt fence, mulching exposed soil,and proper construction methods should prevent erosion from occurring on the site. Section 8 Construction Phasing This is a small project and will be done in one phase. Section 9 Construction Schedule Construction will start this summer as soon as permits are obtained and should be complete by this winter. Section 10 Financial Ownership Richard Vaisvila will have ownership of this project. Section 11 Engineering Calculations Due to the small size of this project no Engineering Calculations are required Section 12 Responsible Person The person responsible for this project is: Richard Vaisvila richardvaisvila(c�comcast.net Phone: 425-299-1739 E4)