Rock Creek, also known as Triangle Reservoir, is a privately owned water source located in Owyhee, Idaho. This reservoir serves primarily for irrigation purposes and was completed in 1965. With a dam height of 36.5 feet and a storage capacity of 1184 acre-feet, Rock Creek plays a crucial role in supporting the agricultural needs of the region.

Managed by the Idaho Department of Water Resources, Rock Creek is regulated, inspected, and enforced to ensure its safety and functionality. The dam is classified as an earth dam with stone core types and is situated on the Rock Creek and North Boulder Creek. Despite being in fair condition, the reservoir poses a significant hazard potential, leading to a very high risk assessment. With a controlled spillway and a maximum discharge capacity of 2050 cubic feet per second, Rock Creek is a vital water resource in the area.

Located in the scenic Triangle Road area, Rock Creek offers a picturesque setting for water resource and climate enthusiasts. As one of the key irrigation sources in Owyhee County, this reservoir serves as a lifeline for agricultural activities in the region and plays a crucial role in water management and conservation efforts. Despite its risk potential, Rock Creek continues to be a vital asset for the local community and an essential component of the water infrastructure in Idaho.