Yes. Again, with the scientific community and the researchers finding more and more things that are answering some of our questions, phosphorus gets tied up.... There are different forms of phosphorus. We have soluble and insoluble, and it will get tied up in the sediments so that if they are sitting in the riverbank or in the bottom sediment in some of the wetlands, certain conditions will flush them through. It's very difficult to monitor and to do cause and effect. You do a planting, and a buffer, and a nutrient management plan, and A, B, C, and D on the upper headwaters. How do you measure or monitor that impact? We're finding it is difficult, so again, we turn back to the work being done by researchers, either on the plot scale or on the field scale, and have to extrapolate.
You'll see the success stories with the Grand River through our water management plan, and those sorts of things, where we can identify some of our sub-basins that are improving when you look at the nutrient index or areas where we have anecdotal evidence from the farmers who say, there were never fish and they're now seeing fish. We have a group that's actually putting trout back in the Conestoga River below the dam, because we have the cold water coming out of the dam at Conestoga, and with some work that's been done in the upstream that area will support trout now.
We have some success stories. There are other areas that may not be quite so successful where we have more work to do.