On the east side of O'Neill Dam there are seven toe drains that flow into three separate drainage ditches. The ongoing accumulation of vegetation and sediment impedes the flow of water that can discharge into the ditches from the toe drains. To maintain flow capacity, the Department of Water Resources' (DWR) San Luis Field Division (SLFD) will use a backhoe, excavator, hand tools, and herbicides to remove accumulated vegetation and sediment in each of the drainage ditches where channel capacity is diminished. Each ditch will be cleared starting from the point where the ditch exits the toe of O’Neill Dam, downstream to the point where the ditch is no longer in the San Luis Canal right-of-way. Six weir boxes are associated with this toe drain/ditch system; these weir boxes will be cleaned as needed. Approximately 1,000 feet of ditch will be cleaned. Removed sediment and vegetation will be stockpiled onsite or at the San Luis Dam maintenance yard. The California Conservation Corps may assist with this work; all herbicides will be applied according to manufacturer specifications. This work will occur annually.