Chew Valley Lake is a large reservoir located in Chew Valley, Somerset, England. It is the fifth-largest artificial lake in the United Kingdom, with an area of 1,200 acres (4.9 square kilometers).

The lake was created in the early 1950s by flooding the valley of the River Chew. It was officially opened by Queen Elizabeth II in 1956. The lake provides much of the drinking water for the city of Bristol and the surrounding area. It is also a popular spot for fishing, sailing, and birdwatching.

Here are some additional details about Chew Valley Lake:

• Location: Chew Valley, Somerset, England
• Area: 1,200 acres (4.9 square kilometers)
• Average depth: 14 feet (4 meters)
• Maximum depth: 37 feet (11 meters)
• Opened: 1956