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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 Manhole Locking Mechanism cannot be opened by one Mechanism opens with proper tools. <br /> Mechanism Not maintenance person with proper tools.Bolts into <br /> Working frame have less than one-half inch of thread <br /> (may not apply to self-locking lids). <br /> A Manhole Cover Difficult to One maintenance person cannot remove lid Cover can be removed and reinstalled by <br /> Remove after applying normal lifting pressure. Intent is to one maintenance person. <br /> keep cover from sealing off access to <br /> maintenance. <br /> A Manhole Ladder Rungs Ladder is unsafe due to missing rungs, Ladder meets design standards.Allows <br /> Unsafe misalignment, not securely attached to structure maintenance person safe access. <br /> wall, rust,or cracks. <br /> If you are unsure whether a problem exists, please contact a professional engineer. <br /> Control structures are usually considered a confined space. Visual inspections should be performed aboveground. If entry is required it should be <br /> performed by qualified personnel. <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-13 <br />