The Craig Goch Dam, is a masonry dam in the Elan Valley of Wales and creates the upper-most of the Elan Valley Reservoirs. Construction on the dam began in 1897, and it was completed in 1904. The primary purpose of the dam and the other reservoirs is to supply Birmingham with water. The dam was the location of the opening ceremony, on the 21st of July 1904, where King Edward VII and Queen Alexandra officially opened the scheme.[Wikipedia].