3105 PINE ST DELTA HOTEL 2020-05-04

ProposedSite Information: 1. How will your project change the existing conditions? This project will include a building addition to the east side of the structure and bump outs on the west side. Localized parking lot reconfigurations will also be completed to relocate the displaced parking stalls resulting from the building modifications. Additionally,within the right-of-way, approximately 200 linear feet of frontage improvements will be completed along Pine Street. These improvements will consist of a curb bump-out, a new curb ramp, and a new driveway for access to the hotel porte cochere. 2. Please provide the following quantities of proposed hard surfaces in square feet: Proposed Roof Area: 1,215 sf added Proposed Other Hard Surfaces(pavement,gravel,etc.): -309 sf(net) 3. How will you manage rooftop runoff after the project is completed? Roof runoff will be managed the same as the existing condition. No change anticipated. 4. How will you manage stormwater runoff from hard surfaces(driveways, paved pathways, patios, etc.)?Evaluate each type of hard surface separately. Stormwater runoff will be managed the same as the existing condition. No change anticipated. Plan for Permanent On-Site Stormwater Management: You are required to "infiltrate, retain, and disperse stormwater"on your site to the maximum extent you can without causing erosion or flooding.The goal is to get stormwater runoff in contact with vegetated surfaces as much as possible before discharging to downstream conveyance systems. See Volume III, Chapter 12 of the 2010 Storm water Management Manual for stormwater facility requirements: https://everettwa.gov/DocumentCenter/Home/View/1214 1. Determine which options you must use for managing stormwater from rooftops via downspout disconnect by considering the following Best Management Practices(BMPs) in order: • BMP 12.30 On-site Infiltration Areas • BMP 12.40 Raingardens • BMP 12.50 Downspout Dispersion Notes: a. If location criteria can be met, but sizing criteria cannot,you must implement the BMPs to the maximum extent you can without causing erosion or flooding. Pre-sized facilities have been designed to meet 100%mitigation. Facilities may be able to be installed to achieve some stormwater mitigation. b. Other innovative downspout control BMPs such as rain barrels,ornamental ponds, downspout cisterns, dry wells,or other downspout water storage devices may also be used with prior approval by the City of Everett.These are options to consider after the above listed BMPs are evaluated. 2. Determine which options you must use for managing stormwater from hard surfaces(driveways, paved pathways, etc.) by considering the following for each type of hard surface proposed: • BMP 12.60 Concentrated Flow Dispersion • BMP 12.70 Sheet Flow Dispersion Page 3 of 7 ITS OF EVERETT TT I 3200 Ceear Street I Everett, WA 98201 ; 425-L57-8810 7-881.0 everett va, e.