Iroquois and Willow Ponds are the focus of an EPA grant received by Olmsted Parks Conservancy with the intent of improving water quality. Pond Creek is the receiving stream for Iroquois Pond and Beargrass Creek is the receiving stream for Willow Pond. Both are on Kentucky’s list of Impaired Waters as non-supporting of aquatic life and swimming usage.
The Pond’s project includes detention basins, bioretention cells, bioswales, step pools, and various types of pervious surfaces. Iroquois Pond area has three types of pervious surfaces in the Amphitheater parking lot. The pervious surfaces are designed to capture and absorb storm water runoff from the parking surface. Expected results include: water quality, reduced erosion, much needed expansion of the Amphitheater parking lot, and improvement to the disk golf course.
Native trees, shrubs and herbaceous plants are placed in detention basins and bio-swales to enhance these functions and provide a green landscape in the parking area. All of these techniques are designed for multiple functions in order to improve the quality of water leaving the parks. We will monitor for water-quality improvements until early 2013. The monitoring data will enable an assessment of best management practices.