A. General. A customer required to obtain city approval to add impervious area that drains to the city storm drain system is subject to a storm drainage development fee charged to recover an appropriate share of the capital costs of the city's existing and new storm drainage system facilities. No city approval authorizing additional impervious area shall be issued unless the storm drainage development fee has been paid or the director has determined that the fee does not apply. Payment of the storm drainage development fee is in addition to payment of all other applicable fees and charges.
B. Amount of Fee. The fee established by this section is determined by reference to a schedule of fees adopted by city council resolution, subject to the annual adjustment made by the director as provided in subsection C.
C. Annual Adjustment. In January of each year, the director shall adjust the storm drainage development fee schedule then in effect to compensate for an increase in construction costs since the previous adjustment, by applying the following methodology:
1. The director shall first calculate the "current construction cost index," which shall be the average of: (a) the average construction cost index for 20 U.S. cities published in the appropriate January issue of "Engineering News Record" (ENR) magazine; and (b) the construction cost index for San Francisco published in the same issue of ENR magazine.
2. The director shall then calculate the "fee adjustment factor," by dividing the current construction cost index calculated pursuant to paragraph 1 of this subsection by the construction cost index that was calculated in January of the last year in which the storm drainage development fee schedule was changed.
3. If the fee adjustment factor calculated pursuant to paragraph 2 of this subsection is one or less, the storm drainage development fee schedule then in effect shall remain unchanged. If the fee adjustment factor calculated pursuant to said paragraph is greater than one, the director shall adjust the storm drainage development fee schedule then in effect by multiplying each of the fees therein by the fee adjustment factor. If the storm drainage development fee schedule is adjusted as provided herein, the adjusted storm drainage development fee schedule shall become effective on July 1st following the January when the fee adjustment factor is calculated pursuant to paragraphs 1 and 2 of this subsection.
D. Credit for Mitigation Projects. The director may determine an appropriate credit to be given against the storm drainage development fee for a customer who constructs or contributes toward the construction of a project or projects that mitigate the impact on the storm drainage system of storm drainage flows from the customer's premises.
E. City Development Impact Fees. Storm drainage development fees are subject to requirements in chapter 18.56, article I. (Ord. 2023-0022 § 1)