4110 CLIFF DR 2022-01-26 - Laserfiche WebLink

2. EXISTING CONDITIONS SUMMARY The site covers approximately 0.38 acres, with Lot 1 being .7,200 sf (0.17 acres) and Lot 2 being 9,298 sf (0.21 acres). Lot 1 currently consists of mostly lawn with a few fruit trees, maple tree and deciduous tree. Lot 2 currently contains an existing SFR and concrete driveway. The existing structures on Lot 2 will remain and a new SFR is proposed for Lot 1. Access to the site will be from the existing roadway to the east (Olympic Blvd.). Approximately 3,380 sf (0.08 acres) of the site will be impacted by new plus replaced impervious surfaces. The entire Lot 1 of the short plat, approximately 7,200 sf (0.17 acres) will be disturbed as needed for the clearing/grubbing and restoration of the existing lot. The proposed area of disturbance is the entire Lot 1 of the short plat. The proposed area of disturbance drains to the northwest. The downspouts from the. existing SFR on Lot 2 are tightlined underground. The outfall of these tightlined pipes could not be located. This project will not affect any off -site flows from passing through or around the short plat as in the existing condition. The proposed roof surfaces for this project will be collected by a perforated stub -out connection and directed toward the existing/relocated storm drainage facility within the right-of-way of Olympic Blvd. The USDA Web -Soil Survey mapped the soils as Alderwood gravelly sandy loam. Refer to Figure 4. The general site slopes, in the area of disturbance, are moderate to steep and average approximately 22 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 sedimentation during construction, assuming the basic BMPs included in the SWPPP are installed and maintained properly. Refer to Figure 2 for an existing basin map. Reid SP 15-0714 July 2017 Page 4