Grandy, located in Fremont, Wyoming, is a privately owned irrigation dam on Little Warm Springs Creek. Completed in 1957, this earth dam stands at 15 feet tall and stretches 480 feet in length, with a storage capacity of 126 acre-feet. Despite its age, Grandy is in fair condition and is inspected every five years to ensure its integrity and safety.

With a significant hazard potential, Grandy poses a moderate risk due to its location and design. The spillway, an uncontrolled type with a width of 50 feet, helps manage maximum discharges of up to 135 cubic feet per second. The dam's outlet gate consists of a single slide (sluice gate), which aids in regulating water flow and distribution for irrigation purposes.

Managed by the Walla Walla District and falling under Congressional District 00 in Wyoming, Grandy serves as a crucial component in the local water resource infrastructure. Climate and water enthusiasts will appreciate the unique design and purpose of Grandy, highlighting the essential role it plays in supporting agricultural activities in the region.