North Cove Creek, also known as Swain Number One, is a private water resource located in Weiser, Idaho. Built in 1975 for irrigation purposes, this earth dam stands at a height of 26.4 feet and has a storage capacity of 94 acre-feet. With a low hazard potential and fair condition assessment, North Cove Creek serves as a vital source of water for the surrounding area.

Managed by the Idaho Department of Water Resources, this dam on Cove Creek, a tributary of the Weiser River, covers a surface area of 14 acres and has a drainage area of 1.6 square miles. Its uncontrolled spillway allows for a maximum discharge of 440 cubic feet per second. Despite its moderate risk assessment, North Cove Creek is regularly inspected and regulated to ensure its safe operation and water storage capabilities.

Located within the Walla Walla District, North Cove Creek plays a crucial role in providing irrigation water for agricultural purposes in the region. With its stone core and rock-soil foundations, this dam continues to support the local community while maintaining a balance between water resource management and environmental conservation.