Mc Nulty Dam, also known as Mcnulty Reservoir, is a gravity dam located in Malheur, Oregon, along the Juniper Creek. Built in 2004 by the Bureau of Land Management, the primary purpose of this dam is for fire protection, stock, and as a small fish pond. With a structural height of 13 feet and a hydraulic height of 7 feet, the dam has a storage capacity of 67.2 acre-feet and covers a surface area of 19.4 acres.

Despite its low hazard potential, the dam's condition assessment is rated as poor, indicating a need for maintenance and repairs. The dam has an uncontrolled spillway with a width of 27 feet and a maximum discharge capacity of 2090 cubic feet per second. While the risk assessment for this dam is moderate, with a DSAC assigned date yet to be determined, it is important for water resource and climate enthusiasts to monitor its condition closely to ensure the safety and integrity of the structure for both its intended purposes and the surrounding environment.

With the Bureau of Land Management overseeing its operations, inspections, and regulatory aspects, Mc Nulty Dam serves as a vital infrastructure for the region. As a key feature in the local water management system, the dam plays a crucial role in maintaining water resources for various uses, including firefighting, livestock, and ecological conservation. However, with its current condition assessment, there is a pressing need for ongoing maintenance and risk management measures to ensure the long-term sustainability and safety of this essential water resource structure.