Waldo Lake, located in Marion, Oregon, is a stunning private reservoir with a primary purpose of irrigation. Built in 1960, this earth dam stands at a height of 13 feet and has a hydraulic height of 11 feet. With a storage capacity of 56 acre-feet and a surface area of 14 acres, Waldo Lake plays a crucial role in water management in the area. It is situated in the Little Pudding River watershed, providing water for agricultural use in the region.

Managed by the Natural Resources Conservation Service, Waldo Lake has a significant hazard potential and undergoes inspections every three years to ensure its structural integrity. The reservoir is state regulated and permits are required for its operation and maintenance. The dam, with a length of 1200 feet, has an outlet gate in the form of a slide (sluice gate) for water release. Despite its importance for irrigation, Waldo Lake also serves as a recreational spot for water enthusiasts and nature lovers, offering a tranquil setting surrounded by natural beauty in the heart of Oregon.