Grouse Creek Main Dam, also known as Grouse Creek South Dam, is a vital Federal-owned structure in Bonner, Idaho, serving primarily for irrigation purposes. Completed in 1992, this Earth-type dam stands at a height of 17 feet and has a normal storage capacity of 57 acre-feet. Situated on the Spring Grouse Creek, this dam plays a crucial role in managing water resources in the region.

With a low hazard potential and fair condition assessment, Grouse Creek Main Dam has been inspected regularly, with the last assessment conducted in October 2017. The dam features an uncontrolled spillway with a width of 5 feet, ensuring the safe release of excess water during periods of high flow. While the risk assessment indicates a moderate level of risk, measures are in place to manage any potential issues that may arise.

Overall, Grouse Creek Main Dam is a key infrastructure component in the water resource management system of the area, providing essential irrigation water for agricultural activities. Its strategic location and design ensure the efficient utilization of water from Spring Grouse Creek, contributing to the sustainable development of the region while maintaining a focus on safety and risk management.