When an underground utility installation is made within five years after improvement of a street to city standards, a disruption fee in addition to the fees prescribed in this chapter shall apply. This additional disruption fee shall be five times the estimated cost of restoration as determined by the director of public works if the installation is made during the first year after the street improvement is completed, four times during the second year, three times during the third year, two times during the fourth year and equal to the estimated restoration cost during the fifth year; provided, however, the director of public works shall notify all persons utilizing any portion of the city right-of-way under a franchise and such other special districts and municipal corporations as may be subjected to said disruption fee as soon as practicable following the final decision of the city to so improve a street. (Ord. 612 §5, 1981).