In 1915 the San Diego city council, pressured by the San Diego Wide Awake Improvement Club, approached Hatfield to produce rain to fill the Morena Dam reservoir. Hatfield offered to produce rain for free, then charge $1,000 per inch ($393.7 per centimetre) for between forty and fifty inches (1.02 to 1.27 m) and free again over fifty inches (1.27 m). The council voted four to one for a $10,000 fee, payable when the reservoir was filled. A formal agreement was never drawn up, though Hatfield continued based on verbal understanding. Hatfield, with his brother, built a tower beside Lake Morena and was ready early in the New Year.