7102 LOWER RIDGE RD 2018-07-25 - Laserfiche WebLink

OFF SITE ANALYSIS AND MITIGATION An Off Site Analysis and Mitigation Study meeting requirements outlined in Volume 1,Section 3.1.3 was performed on October 5,2017. The weather was partly cloudy at the time of the field inspection. See Downstream Analysis Map. TASK I: PROJECT OVERVIEW& STUDY AREA DEFINITION The proposed project is located on the west side of Lower Ridge Road in Everett WA Existing Site Conditions: The existing lot contains an existing home(which will be removed) and an existing access driveway. The majority of the site has been cleared and contains a few trees. The site drains to the east towards the road. TASK 2: REVIEW OF AVAILABLE INFORMATION ON STUDY AREA Resource Review: The following is a description of the resources that were reviewed for the preparation of this Level 1 Drainage Study: A. Basin Recognizance Summary:Enclosed within are downstream and upstream basin area map which clearly define the flow pass and the drainage basins related to this project. See (Downstream Analysis Map ) Evidence of Existing and Predicted Problems Lack of capacity or constrictions in the existing drainage system. O On-site: No evidence of any problem. O Off-site: Stream None noted Culverts None known (no evidence of capacity or any other problems) Overtopping, Scouring,Bank, Sloughing of Sedimentation O On-site: No evidence of any problem. O Off-site: C 12-inch pipes: N/A C Stream Channel: none noted Flooding etc. O None Noted Significant Destruction of Aquatic Habitat or Organisms O None Noted B. Adopted Basin Plans:None Known C. Floodplain/Floodway(FEMA Maps):Does not appear to be located within the flood plain of the stream as determined by the FEMA maps. D. Other Off-Site Analysis Issues: None Noted 7102 Lower Ridge RD Full Drainage Report Revised:November 3,2017 Page 4