Prado Reservoir
General data
- Name: Prado Reservoir
- Water system: Pacific Ocean
- Water type: Artificial lake
- Progression: Santa Ana River -> Pacific Ocean -> Planet Earth
- Climates: Temperate
- Continents: North America
- Countries: United States of America
Prado Reservoir is a reservoir in northwestern Riverside County and southwestern San Bernardino County, a couple of miles west of the city of Corona, in the U.S. state of California. The reservoir has a capacity of 362,000 acre-feet (447,000,000 m3) and is formed by Prado Dam on the Santa Ana River. The dam is composed of rock-fill and has a height of 106 feet (32 m) above the original streambed. It was built on the upper end of the Lower Santa Ana River Canyon, where there is a natural constriction in the river. It is below 2,255 square miles (5,840 km2) of the 2,450-square-mile (6,300 km2) Santa Ana River watershed. The dam was built by the United States Army Corps of Engineers and was completed in 1941.