OTHER-2022-036-Stormwater operations and maintenance plan agreement

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• Remediate bare soils or erosive gullies . o In perimeter areas , regrade the soil to remove the gully, plant a ground cover and water until it is established . If soil test shows that the pH has dropped , dolomitic lime shall be applied as recommended . o Within the pretreatment area , provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion . Structural integrity • Replace or repair any cracked , separated or damaged inlet pipes , outfalls, impoundment walls or other structural elements . • If dam embankment or emergency spillway needs maintenance, consult with a professional . Functionality • Sediment Accumulation o Maintain stable ground cover in the drainage area . o Sweep or vacuum sediment on pavement in the contributing drainage area . o If sedimentation or clogging is occurring in the inlet, design modification may be needed to ensure adequate drop or slope between inlet and filter bed . o If sediment has accumulated in the forebay area reducing its depth to 75 % of the original design depth , remove the sediment off site , restabilize the area , and replace with clean rock . Search for the source of the sediment in the drainage area and remedy the problem if possible . • If there are visible disturbances to the forebay design , make the necessary repairs to ensure that the forebay is functioning as intended . • If evidence of a muskrat or beaver activity is observed , contact a professional to remove muskrat or beaver . • If the basin must be drained for an emergency or to perform maintenance , the flushing of sediment through the emergency drain should be minimized to the maximum extent practical . For additional information or if damage has occurred at the outlet which effects the receiving water, contact the Town at Chapel Hill Stormwater Management at 919 - 969111117246 ( RAIN ) .