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Project ID: City of Ramsey Riversbend Pond Protect, 2024 <br />Exhibit B — Operation & Maintenance Plan <br />Operations and Maintenance Guidelines <br />for the Riversbend Pond <br />This document describes tasks that should occur on a regular basis to remove captured pollutants and <br />ensure the long-term success of the ponds. <br />Stormwater ponds are a cost effective practice capable of settling and capturing pollutants. The <br />pollutants of greatest concern are particulate solids and phosphorus. As the basins fill with these <br />pollutants, the effectiveness of the ponds will decrease and previously captured pollutants could be <br />released from the pond into the lake. <br />ANKKA <br />'ONSERVATION <br />40ISTRICT <br />Task <br />Year 1 after construction <br />Years 2-25 <br />Inspections <br />Inspect twice. Inspect for: <br />• Erosion and stability. <br />• Inlet and outlet integrity. <br />• Trash, yard waste or <br />other debris. <br />• Pond is operating as <br />designed. <br />Correct any problems. <br />Inspect every five years minimum, examining the items <br />listed for the year 1 inspection plus: <br />• Measure accumulated sediment. <br />Accumulated <br />Sediment <br />Removal <br />The MN Stormwater Manual recommends maintenance <br />action when 50% of the pond volume has been lost to <br />accumulated sediment. For inspection simplicity, the <br />pond will be re -excavated to the design profile when <br />the maximum depth has been reduced by 50% from the <br />as -built depth. <br />Contact the Anoka Conservation District at 763-434-2030 with any questions. <br />