Kirwin Reservoir
General data
- Name: Kirwin Reservoir
- Water system: Missouri River
- Water type: Artificial lake
- Progression: North Fork Solomon River -> Waconda Lake (Glen Elder) -> Solomon River (Kansas) -> Smoky Hill River -> Kansas River -> Missouri River -> Mississippi River -> Gulf of Mexico -> Atlantic Ocean -> Planet Earth
- Climates: Temperate
- Continents: North America
- Countries: United States of America
Kirwin Reservoir is a reservoir in Phillips County, Kansas, United States. It is located next to the city of Kirwin in northern Kansas. The U.S. Bureau of Reclamation built it and continues to operate it for the purposes of flood control and area irrigation. The Kirwin National Wildlife Refuge lies on its shores. The surface area, surface elevation, and water volume of the reservoir fluctuate based on inflow and local climatic conditions. In terms of capacity, the Bureau of Reclamation vertically divides the reservoir into a set of pools based on volume and water level, and it considers the reservoir full when filled to the capacity of its active conservation pool. When full, Kirwin Reservoir has a surface area of 20.55 km2, a surface elevation of 527 m, and a volume of 121,071,000 m3. When filled to maximum capacity, it has a surface area of 59.3 km2, a surface elevation of 540 m, and a volume of 631,243,000 m3.