10524 13TH AVE W 2024-12-02 - Laserfiche WebLink

• • PUBLIC WORKS b. C L PLANS The outlet pipe from the wetland to the west of this project crosses the northeast corner of proposed lot 1. A minimum of 5' from the edge of this pipe shall be dedicated in a private drainage easement granted to the adjacent property owner at 10518 13th Ave W, where the pipe originates. The existing pipe information for the 18" storm drain along the frontage of this project indicates the pipe is corrugated metal on all the plan views. However, the detail of CB #2 on the profile view indicates the pipe is CPEP. All references to the pipe must be consistent. If any portion of the drainage system for the two lots is shared, such as the pipe connecting the two proposed perforated stub-outs, a private drainage easement must be provided to the upstream property owner for the portion of the system located on the adjacent, downstream property. If feasible, the systems must be kept separate in order to avoid conflicts between neighbors in the future... Therefore, any drainage system on lot 2 should be connected to the catch basin in the ROW in front of lot 2. . The following performance standard for BMP T5.13 shall be included on the storm drainage plans: • BMP T5.13: Post-Construction Soil Quality and Depth o Soil Quality: All areas subject to clearing and grading that have not been covered by hard surface, incorporated into a drainage facility, or engineered as structural fill or slope shall demonstrate the following at project completion: i. A topsoil layer with a minimum organic matter content of 10% dry weight in planting beds and 5% organic content in turf areas, with a pH from 6.0 — 8.0 or matching the pH of the undisturbed native soil. ii. The topsoil layer shall have a minimum depth of eight inches except where tree roots limit the depth of incorporation of amendments needed to meet the criteria. iii. Subsoils below the topsoil layer shall be scarified at least four inches with some incorporation of the upper material to avoid stratified layers, where feasible. iv. Planting beds shall be mulched with 2 inches of organic material. 3. The comments below were generated from this project's Planning Reviewer. If you have any questions regarding these comments,please contact Dave Tyler with the City of Everett Planning Department(425-257-7164 or DTyler@everettwa.gov). a. A Landscape Plan, meeting the requriements of EMC 18.28.080 is required to be submitted with the Public Works permit revisions. Landscape plans must be prepared by professionals licensed or certified in Washington State. The landscape plan may be incorporated into the site development plan or provided separately. All trees are required to have a minimum caliper of 2.5 inches and a minimum height of 6 feet at the time of planting. Trees must be installed, staked, and mulched prior to final approval and recording of the short plat. Page 4 of 5