2318 HIGHLAND AVE B 2023-12-07 - Laserfiche WebLink

4. 50 feet setback from slopes greater than 15 percent and greater than 10 feet in height. fit,' 5. All underground stormwater facilities shall be setback from any structured or property line a •i istance equal to the depth of the ground disturbed in setting the structure. V Infiltration trenches may be located under pavement if a small yard drain or catch basin with grate cover is placed at the end of the trench pipe such that overflow would occur out of the 2019 Stormwater Management Manual for Western Washington Volume V-Chapter 4- Page 707 catch basin at an elevation at least one foot below that of the pavement,and in a location which can accommodate the overflow without creating a significant adverse impact to downhill properties or drainage systems.This is intended to prevent saturation of the pavement in the event of system failure. 6. Applicable access requirements of DCSS 4-4.2 (3) have been met. 7. Filter fabric shall be placed over the drai .rock as shown on Figure V-4.I:Typical Downspout Infiltration Trench prior to backfilling. 8. Does this project include infiltration of runoff from pollution generating surfaces? Yes. Treatment is required and shall be designed per the 2019 SWMMWW. Indicate type and sizing of treatment that will be provided prior to infiltration(provide BMP number,and sizing of BMP). No. No treatment required. City of Everett Public Works Small Project Stormwater Site Plan Report for Projects in 18 the Combined Sewer Area-April 2021