3531 NORTON AVE 2022-02-23 - Laserfiche WebLink

1. PROJECT OVERVIEW This document is intended to provide the engineering information necessary to support the building permit application for a new duplex in the City of Everett. The site covers 0.47 acres. The existing site is currently developed and consists of a driveway, concrete pad, brush/trees. The east side of the site contains steep slopes and is currently undeveloped. The proposed disturbance area will cover approximately 8,158 sf.The proposed duplex will be set approximately 30 feet east of the western property line. Access to the new duplex will be taken from the existing paved driveway which takes access from the existing roadway to the west(Norton Ave), across tax parcels 00451400301601 and 00451400301602. This development proposes to construct a new duplex and will utilize the existing driveway and parking pad. The total new plus replaced impervious surfaces equal 3,049 sf (0.07 acres). This project proposes to construct less than 5,000 sf of new and replaced impervious surfaces. Therefore, Minimum Requirements 1-5 apply to all of the new and replaced impervious surfaces for this project along with all the converted vegetated areas. Figures 2&3 are provided to show the existing and developed basins and runoff conditions for this site. The runoff in the existing conditions sheet flows over vegetated surfaces to the north toward the northern property line. Roof runoff from the proposed duplex will be tightlined to a perforated stub-out connection at the toe of the steep slopes. All drainage improvements have been designed to meet or exceed the 2014 DOE Stormwater Management Manual and the City of Everett(COE) Stormwater Management Manual. The project location is 3600 Grand Ave, in the City of Everett, and in Section 30, Township 29N, Range 5E. See Figure 1 -Vicinity Map. Grandview Ave Duplex 18-1001 January 2019 Pcge4 15