Poison Hemlock has invaded the riparian buffers along the creeks in Allentown Parks. These buffers are to accommodate the Wildlands Conservancy, which essentially dictates all park policy, except recreation, in both Allentown and South Whitehall. I suppose now the Wildlands can add pet killer to their dam buster credentials.
Allentown has been trying to control the problem by high rough cutting in spots where they see the hemlock. The real solution is to go back to the way the parks were designed, without riparian buffers.
Frankly, I haven't had much success in curtailing the Wildlands Conservancy's influence in these park decisions. So far, we lost two small historic dams, and the iconic Wehr's Dam is soon to go. We lost the view and access to the creeks in the park system, around which the parks were designed, by Harry Trexler's landscape architect. I have succeeded in creating a public record of these losses, and I will continue to speak out against how our parks are being compromised.
above reprinted from July of 2016
ADDENDUM JUNE 8, 2022: Park visitors may have noticed that the buffers have been cut down, except for a strip right along the creeks. The cutting was done because the buffers were full of invasive species. Ironically, the remaining strips are almost exclusively Poison Hemlock, the worst of the invasives. More ironically, the park department has taken to planting the new trees on the outer edge of the buffer (instead of along the creeks), so now cutting the grass is so much more labor intensive. Thank the Wildlands Conservancy for this bastardization of the park system. The solution is to cut down the remaining strip, and start cutting the grass to the creek's edge, as prescribed by the park architect in the 1930's. Furthermore, start planting willow trees along the creeks to combat erosion.
ADDENDUM MAY 10, 2024:Cedar Park along the creek is once again infested with Poison Hemlock. It will always be that way until they start mowing the creek banks on a regular schedule. For the last five years or so, they control the Hemlock by cutting it down in late May, early June, just when the ducklings have hatched. I have no expectation that their schedule will change. Last season, not one duckling on the west side of the park survived. There were two families born on the Island in Muhlenberg Lake which fared better. If they would cut the creek banks along with the grass, the ducks would find safe places to nest. Instead, we have a stubborn park department, Poison Hemlock and ground up ducklings.