By Admin User
•
February 21, 2025
The picture above shows the 3 dam locations. The area shown with the yellow outline is the common area at the north dam. The north dam is the most important to the SMHOA. The other 2 dams drain into the north dam. If one of the other dams fails, the north dam will need to slow the release of the ponds. The north dam outlets into Indian Creek which parallels Indian Point Road. If the north dam fails, Indian Point Road would be threatened. Thankfully, no homes are located along Indian Creek immediately downstream of our subdivision. The outlet of the north dam is very similar to the west dam outlet that was protected in the Fall 2024. The dam outlet consists of the overflow structure in the north pond. The overflow shown in Figure 1, drops, and runs under the north dam. Figure 2 shows the outlet of the dam in the common area. The outlet is approximately 6’ above the bottom of the creek due to the force of the water dropping into the creek. Erosion has lowered the creek bottom and creek banks. The trees in the area have exposed roots due to the erosion of the flowing water. With the roots exposed, the tress become unstable and fall into the creek. These fallen trees cause more erosion as the water must fight it’s way past these obstructions. The outlet needs to be stabilized to prevent failure of the north dam. The trees with exposed roots will be removed. This summer as the creek dries out, riprap will be placed below the outlet pipe. This riprap will be placed in the creek for 25’ downstream of the outlet pipe to protect the creek. A rough estimate of the riprap needed is 170 tons delivered $4800. If the material can be purchased from the Road Commissioner, the price will drop to $2500. The additional funding requested for the maintenance of the north dam will be used to place riprap on the face of the dam. This riprap will stabilize the dam against rising water levels during heavy rains. The face should be riprapped to the low point of the emergency overflow. More photos to follow showing blockages downstream causing backing up of water, some natural, some by dumping of leaves etc.