2712 TAYLOR DR 2023-11-01 - Laserfiche WebLink

2. EXISTING CONDITIONS SUMMARY The entire property consists of 0.42 acres. Runoff generated from the :existing site sheet flows in`a generally northwestern direction. This project will not affect. any off -site flows from passing through or around the site as in the existing conditions. Land use around the site is primarily single-family homes. The parcel associated with this project is partially developed and currently contains a garage (recently removed), gravel driveway and lawn The grades on the site in the area of the proposed SFR and garage are moderate and average approximately 7%. Soil 'Jogs taken by Cobalt Geosciences for a geotechnical investigation were : used to determin&the soils'on-site.`So l logs showed approximately 6 inches of topsoil underlainby loamy sand with gravel to approximately 6 feet below grade. Groundwater was not encountered, but some perched groundwater (mottling) was observed throughout the hand borings. The geotechnical engineer re -visited the site on December 21, .2020 to find a perched groundwater elevation of approximately 191.2'. The 'USDA Web Soil Surveywas also used to show that the site consists of Alderwood gravelly sandy loam and Alderwood- Everett gravelly sandy-loam..General site slopes in the area of disturbance are moderate and average approximately 7 percent. Based on the existing soil information ,and the setbacks of the proposed improvements from.any of the property lines or critical areas there is little potential for erosion or edimentation during construction assuming the basic BMPs included in the SWPPP are installed and. maintained properly. Refer to Figure 2 for an existing basin map.