Mann Creek, also known as Spangler, is a federally owned irrigation structure located in Weiser, Idaho. Managed by the Bureau of Reclamation, this earth dam was completed in 1966 and serves the primary purpose of irrigation. With a height of 148 feet and a storage capacity of 15,372 acre-feet, Mann Creek plays a crucial role in water management in the region.

The dam, with a spillway width of 69 feet, has a maximum discharge capacity of 3,885 cubic feet per second, ensuring efficient water release during peak flow periods. Although categorized as having a high hazard potential, the overall risk assessment for Mann Creek is moderate. Despite the lack of available condition assessment data, the structure undergoes regular inspections by the Bureau of Reclamation to ensure its safety and functionality for the surrounding community.

Located in the Walla Walla District, Mann Creek is a key component of the local water infrastructure, providing essential irrigation water for agricultural activities in the area. As a climate and water resource enthusiast, exploring the details of Mann Creek offers valuable insights into the management and regulation of water resources in Idaho, highlighting the importance of sustainable water practices for the future.