Three copies of detailed plans or drawings of water line extensions, prepared by a licensed engineer, accurately indicating main size, the location of all valves, fire hydrants and thrust blocks to be installed shall be submitted to the city engineer and fire department prior to the commencement of any construction. Detailed plans should be submitted on a scale of 1" = 50’. A schematic diagram on a scale of 1" = 100’, 200’ or 300’ shall also be submitted which shows proposed line size, valve location and hydrant location and sheet number of detailed plans. Engineering calculations showing capability of the proposed extension to deliver the required fire flow plus domestic flow at the required residual pressure shall be submitted for approval. (Ord. 1097 §9, 1999; Ord. 494 §14, 1978).