Corcoran, also known as Rock Creek, is a private irrigation dam located in Harney, Oregon. Built in 1949, this earth dam stands at a height of 39 feet and serves the primary purpose of irrigation. With a storage capacity of 1630 acre-feet and a drainage area of 3.6 square miles, Corcoran plays a crucial role in managing water resources in the region.

Owned privately and regulated by the Oregon Water Resources Department, Corcoran has a significant hazard potential and undergoes inspections every three years. The dam's outlet gates consist of a slide (sluice gate), and it has a maximum discharge capacity of 518 cubic feet per second. Despite not having a condition assessment rating, Corcoran remains a key structure in the state's water management system, providing essential irrigation water for agricultural purposes.

Located in a remote area with no downstream settlement, Corcoran ensures water availability for the surrounding agriculture while adhering to state regulations for inspection, enforcement, and permitting. With its historical significance and continued operation, Corcoran stands as a testament to the importance of sustainable water resource management in the face of changing climates and increasing demands for water.