1505 112TH ST SW 2018-01-02 MF Import

PLAN REVIEN �ONNENTB Vegetated swalest XRip-rap should be provided at the inlet to the swale. C'^ P A The biofiltration swale note on sheet C1.2 should specify 5),o Z 3:1 maximum side slopes. � The following note should be added on the page with the biofiltration swale cross -sectional details: NOTE: the specified biofiltration seed mix is not a standard mix and will need to be specially ordered. Allow 7-4 weeks for delivery of the mix. If problems are _ encountered in obtaining a mix meeting the City's specifications, please contact Jane Zimmerman, City of Everett Public Works, at 259-8800. Standards for vegetated swale construction have changed recently and are not yet included in the standards manual. The paragraphs given in the attached sheet entitled �. "Construction of Vegetated Swales" must be included on the plans. The swale seed and plant list from page IV-17 of the City's standards must also be included on the plans. A copy of the list is attached. The list of additional vegetation for biofiltration swales was written for a one foot wide swale. Given that the swales on this site are designed to be wider than one foot, the specification for each vegetation type must be changed from 1125 clumps per lineal foot of swale" to 1125 clumps per eguare foot of swale". 5� r The swale construction notes and swale planting/seeding requirements must be shown on both the landscaping plan and the storm drainage plan, as well as the attached detail Crr �Z1'D'V showing the cross-section of the biofiltration/grass swale. �sn)�(t . The entire associated side slope of the Swale, from the ✓ bottom of the Swale to the top of the adjacent bank, must have a maximum slope of 1:1, unless rockeries or retaining walls are used. now control structure (restrictor cbft T The location of the flow control struct e(s Ost be `fi I,Rn7 clearly shown on sheet C1.2. 6410 A detail of the flow control structure(s) must be provided (tih✓ loF Z in the plans. All orifice elevations and sizes must be GZ. clearly shown, as well as the overflow elevation. L:;