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CITY OF EVERETT STORMWATER MANAGEMENT MANUAL <br /> Date <br /> Drainage <br /> System Maintenance Activities and Conditions <br /> Frequency Feature ✓ I I ✓ Problem Conditions to Check For That Should Exist <br /> A Catch Cover Difficult to One maintenance person cannot remove lid Cover can be removed by one maintenance <br /> Basin Remove after applying normal lifting pressure. person. <br /> Cover (Intent is keep cover from sealing off access to <br /> maintenance.) <br /> A Ladder Ladder Rungs Ladder is unsafe due to missing rungs, not Ladder meets design standards and allows <br /> Unsafe securely attached to basin wall, misalignment, 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 20 Grate free of trash and debris. <br /> percent of grate surface inletting capacity. <br /> A Grates Damaged or Grate missing or broken member(s)of the grate. Grate is in place and meets design <br /> 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 /> Appendices <br /> F-16 <br />