Haweswater is now one of the largest lakes at 4 miles long and 1/2 mile wide, and has a maximum depth of 200 feet . It is the most easterly of the lakes, and has no settlements on its shores. In 1929, despite many petitions against it, a bill was passed by Parliament authorising the use of Haweswater as a reservoir for Manchester. A concrete dam, 1550 feet wide and 120 feet high was built, and this raised the lake level by 95 feet.

Haweswater is now one of the largest lakes at 4 miles long and 1/2 mile wide, and has a maximum depth of 200 feet . It is the most easterly of the lakes, and has no settlements on its shores. In 1929, despite many petitions against it, a bill was passed by Parliament authorising the use of Haweswater as a reservoir for Manchester. A concrete dam, 1550 feet wide and 120 feet high was built, and this raised the lake level by 95 feet.