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CITY OF EVERETT STORMWATER MANAGEMENT MANUAL <br /> Date <br /> Drainage <br /> System Maintenance Activities and Conditions <br /> Frequency Feature 1 1 1 1 Problem Conditions to Check For That Should Exist <br /> A Catch Cover Difficult to One maintenance person cannot remove Cover can be removed.by one <br /> Basin Remove lid after applying normal lifting pressure. maintenance person. <br /> Cover <br /> (Intent is keep cover from sealing off access <br /> to maintcnanra 1 <br /> A Ladder Ladder Rungs Ladder is unsafe due to missing rungs,not Ladder meets design standards and <br /> Unsafe securely attached to basin wall,misalignment, allows maintenance person safe access. <br /> rust,cracks,or sharp edges. <br /> Grates Grate opening Grate with opening wider than seven-eighths of Grate opening meets design standards. <br /> Unsafe an inch. <br /> M,S Grates Trash and Debris Trash and debris that is blocking more than Grate free of trash and debris. <br /> 20 percent of grate surface inletting capacity. <br /> A Grates Damaged Grate missing or broken member(s)of the grate. Grate is in place and meets design <br /> or Missing. standards. <br /> If you are unsure whether a problem exists, please contact a professional engineer. <br /> Key: <br /> (M) Monthly from October through April. <br /> (A)Once in late summer(preferably September) <br /> (S)After any major storm (use 1 inch in 24 hours as a guideline). <br />