Laserfiche WebLink
Grading for the sw�'_e must be clearly detailed, especially <br />if the swale is located after the pond. If the swale is <br />located after the pond, and discharges to the soutnern <br />wetland, the end of the swale must be specially designed ta <br />disperse the drainage at the edge of the buffer. A sketch <br />of a possible design is attached. <br />If a swale bypass is feasible, the following note should be <br />�dded on the plans with the other swale notes: <br />SPECIAL IN�TRUCTIONS FOR CONSTRUCTION OF VEGETATED SWALES <br />BETWEEN OCTOBER 1 AND APRZL 1: <br />1) place and stake sod in the swale to the freeboard <br />elevation. <br />2) after April 1: <br />a) block the flow into the swale at the <br />diversion structure. <br />b) remove the sod and construct the swale per <br />section 4.15.1.2 of the City of Everett's <br />Design and Construction Standards and <br />Specifications prior to April 15. <br />3) utili7e the swale bypass system to divert flows <br />around the swale until veget3tion i.n the swale has <br />become established. <br />If a swale bypass system is not feasible, the following note <br />should be added instead of the note above: <br />SPECIAL INSTRUCTIONS FOR CONSTRUCTION OF VEGETATED SWALES <br />BETWEEN OCTOBER 1 AND APRIL 1: <br />1) place and stake sod in the swale to the freeboard <br />elevation. <br />2) after April 1, during a period when dry weather is <br />forecast, remove the sod and construct the swale <br />per section 4.15.1.2 of the City of Everett's <br />Design and Construction Standards and <br />Specifications prior to May 15. <br />Wetpond: <br />Catch basin #Z should meet the City standards fur a grit <br />removal chamber upstream of the wetpond. The proposed type <br />I catch basin should be replaced by a 72 inch catch basin <br />with a 48 inch deep sump. <br />