(A) No abutting property shall be reassessed for the same or a similar improvement without receiving a pro rata credit against what would normally be assessed under the provisions of this section. The credit given shall equal a factor of one, minus the fraction where the numerator is the number of whole years since the improvement was last assessed and the denominator is the life span of the improvement in years, and then multiplied by the original assessed amount, but in any event not less than zero. For purposes of this section, improvement spans in years are as follows:
(1) Water and sewer: 40 years;
(2) Storm sewers: 35 years;
(3) Concrete streets/alleys/curb and gutter: 30 years;
(4) Sidewalks: 20 years;
(5) Bituminous streets/alleys/curb and gutter: 20 years; and
(6) Bituminous overlays: 15 years.
(B) This section shall apply only to improvements made directly by city forces or by city contract under the direct authority, supervision and control of the city; it shall not apply to improvements whose proximate cause of damage is an act of nature, such as earthquake, flood, tornado, wind, tree growth or similar matters not associated with or caused by defective workmanship or materials.
(Prior Code, § 2.73) (Ord. 72, Third Series, effective 7-20-1989)