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CITY OF EVERETT STORMWATER MANAGEMENT MANUAL <br /> Bioretention (Swales and Planters) <br /> Date <br /> Drainage <br /> System Maintenance Activities and Conditions <br /> Frequency Feature ✓ ✓ ✓ ✓ Problem Conditions to Check For That Should Exist <br /> B Ponding Cracks or Failure in Cracks wider than%inch or Vault repaired or replaced so that vaults <br /> Area concrete planter maintenance/inspection personnel determine meets design specifications and is <br /> reservoir that the vault is not structurally sound structurally sound. <br /> B Ponding Failure in earthen Erosion (gullies/rills)greater than 2 inches Eliminate source of erosion and stabilize <br /> Area reservoir around inlets, outlet, and along side slopes. damaged area (regrade, rock,vegetation, <br /> (embankments, erosion control blanket) <br /> dikes, berms, and <br /> side slopes) <br /> B Ponding Failure in earthen Settlement greater than 4 inches (relative to Restore to design height <br /> Area reservoir undisturbed sections of berm) <br /> embankments, <br /> dikes, berms, and <br /> side slopes) <br /> A Ponding Failure in earthen Downstream face of berm or embankment wet, Plug holes. Contact geotechnical engineer <br /> Area reservoir seeps or leaks evident ASAP. <br /> (embankments, <br /> dikes, berms, and <br /> side slopes) <br /> A Ponding Failure in earthen Any evidence of rodent holes or water piping Eradicate rodents/repair holes(fill and <br /> Area reservoir around holes if facility acts as dam or berm compact) <br /> (embankments, <br /> dikes, berms, and <br /> side slopes) <br /> Q Ponding Sediment or debris Accumulation of sediment or debris Remove excess sediment or debris. <br /> Area accumulation Identify and control the sediment source, if <br /> feasible. Facility should be free of material. <br /> May contain standing water. <br /> A Ponding Rockery reservoir or Rock walls are insecure. Stabilize walls <br /> Area walls <br /> Appendices <br /> F-54 <br />