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C1TY 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 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 Qctober 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 />