1605 SE EVERETT MALL WAY WALMART 2018-01-01 MF Import

Seattle,Washington IMAM www.pacland.com T 206.522.9510 TURNING VISIONS INTO REALITY Stormwater from the Bob's Burger and Brew property, located east of the subject site, is also conveyed through the site detention pipes and flow control structure. Prior to the development of Bob's Burger and Brew in 2010 their property was a part of the subject property and the existing stormwater system design included this area as a parking lot. The development of Bob's Burger and Brew also included stormwater facilities to meet the stormwater requirements at that time. 111 Existing retail developments to the west of the project area are fully developed and do not substantially run-on to the project area except as noted below. There is onsite run-on from the access drives and properties south and west of the property. According to the original design plans for the site, the access drives south and west of the property were intended to be crowned. Based on the most recent survey prepared by PACE Engineers this is not the case. No changes are proposed to the access drives at this time as the run-on is limited. There are no apparent detention or flow control issues related to the off-site run-on at this time. The area is delineated on the basin map included in Appendix A. ill. Site Development Plan w/On-Site Storm water Management Per the Manual the following site design strategies shall be considered when Minimum Requirement#5 must be met on a project site. In addition to a list of strategies please find below a brief discussion of the feasibility of each strategy: 1. Retaining the duff layer, native topsoil, and natural vegetation in-an undisturbed state to the maximum extent practicable. Limited areas of the site are covered in natural vegetation; mature vegetation is present along the north/northeast site boundaries. This existing vegetation will be preserved and protected during construction. This item is addressed to the maximum extent feasible. 2. Retaining to the maximum extent practicable the features on the site that provide natural stormwater management. The only 'natural' areas onsite that provide stormwater management are listed per item 1 above. This item is addressed to the maximum extent feasible. 3. Maintaining predevelopment flow path lengths and natural drainage patterns whenever possible. The pre-developed condition as defined in the Manual glossary is the existing condition. There are no natural drainage patterns onsite, therefore this item has been determined to be infeasible. Everett Mall Plaza Parcel Ill Retail Expansion Stormwater Site Plan Page-9