Extensions of water lines from the city main to the customer's property line shall be at the customer's cost. The customer shall make a deposit based upon a cost estimate by the city. At the completion of the installation, the public works superintendent shall submit an invoice based on actual materials, including the meter, labor and equipment used, and charge this against the deposit. If the deposit was too large, the customer will be refunded the difference, if it is too small, the customer shall pay the difference. (Ord. 1143, 2-14-1978)