543 VIEW RIDGE DR 2022-03-14 - Laserfiche WebLink

2. EXISTING CONDITIONS SUMMARY The site covers approximately 0.59 acres. The existing site in the area of disturbance currently consists of lawn, landscaping, an existing SFR and concrete driveway. The existing SFR and portions of the driveway are to be removed. Access to the site will be from the existing roadway to the south (View Ridge Dr.). Approximately 7,814 sf (0.18 acres) of the site will be impacted by new plus replaced impervious surfaces. Approximately 12,980 sf (0.30 acres) being disturbed as needed for the clearing/grubbing and restoration of the existing site. The proposed area of disturbance is located centrally on the lot and drains to the northwest. The existing SFR appears to divide runoff two ways by dispersing runoff on - site via downspouts to the north and downspouts tightlined to a yard drain within the existing driveway that drains to the on -site concrete lined manmade pond to the south. There was little observed off -site area that drained toward the project area. This project will not affect any off -site flows from passing through the site as in the existing condition. All of the proposed impervious surfaces for this project will be dispersed on -site. Soil conditions were provided by Brent Hackney Designs, Inc., refer to Appendix B. The soils were found to be sandy loam over medium sand to a depth A layer of sandy loam was found at approximately 0 to 18 inches thick underlain by medium sand, approximately 6 to 48 inches deep. The USDA Web -Soil Survey mapped the soils as Alderwood-Urban land complex. Refer to Figure 4. The general site slopes, in the area of disturbance, are moderate and average approximately 11 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. Pignataro SFR 15-1008 March 2016 Page 4 Revised June 2016