Pitt Lake Dam, located in Bonanza, Oregon, serves as a crucial irrigation source with a primary purpose of providing water for agricultural activities. Completed in 1920, this earth dam stands at a height of 11 feet and has a storage capacity of 122 acre-feet. The dam spans 310 feet in length and is situated along Barnes Valley Creek, a tributary to Pitt Lake.

Despite being classified with a low hazard potential, Pitt Lake Dam is state-regulated and undergoes regular inspections, permitting, and enforcement to ensure its structural integrity and safety. The dam features slide gates for outlet control and has a maximum discharge capacity of 118 cubic feet per second. While its condition assessment currently stands as "Not Rated," the dam continues to play a vital role in the local water resource management efforts, contributing to the sustainability of agricultural practices in the surrounding area.

With its historical significance dating back to the early 20th century, Pitt Lake Dam stands as a testament to the ingenuity and foresight of early water resource developers in Oregon. As a privately owned structure, it exemplifies the collaboration between private owners and state regulatory agencies in managing water resources efficiently and responsibly. As climate change continues to impact water availability and usage patterns, the maintenance and monitoring of dams like Pitt Lake will be crucial in ensuring a reliable and sustainable water supply for future generations.