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CITY OF EVERETT STORMWATER MANAGEMENT MANUAL <br /> Date <br /> Drainage <br /> System Maintenance Activities and Conditions <br /> Frequency Feature ✓ ✓ ✓ ✓ Problem Conditions to Check For That Should Exist <br /> A General Facility Erosion/scouring Areas of potential erosion are visible. Take steps to repair or prevent erosion. <br /> Requirements Identify and address the causes of erosion. <br /> A General Facility Grass/vegetation Less than 75%of planted vegetation is healthy Take appropriate maintenance actions <br /> Requirements with a generally good appearance. (e.g., remove/replace plants) <br /> M General Facility Noxious weeds Listed noxious vegetation is present. See the By law, noxious weeds must be removed <br /> Requirements Snohomish County noxious weed list. and disposed immediately. It is strongly <br /> encouraged that herbicides and pesticides <br /> not be used in order to protect water <br /> quality. <br /> Q General Facility Weeds Weeds are present. Remove and dispose of weed material. It is <br /> Requirements strongly encouraged that herbicides and <br /> pesticides not be used in order to protect <br /> water quality. <br /> If you are unsure whether a problem exists, please contact a professional engineer. <br /> Comments: <br /> Key: <br /> (M) Monthly from November through April. <br /> (A) Annually, once in late summer(preferable September) <br /> (S) After any major storm (use 1-inch in 24 hours as a guideline). <br /> (B) Biannually (spring and fall) <br /> (Q) Quarterly <br /> Appendices <br /> F-62 <br />