The impact fee calculation and schedule shall be based upon the formula set forth below. The formula is the city’s determination of the appropriate proportionate share of the costs of public school capital facilities needed to serve new growth and development to be funded by school impact fees based on the factors defined in ACC 19.02.020. Separate fees shall be calculated for single-family and multifamily dwelling units because of their different impact on school facilities. Separate student generation rates (student factor) must be determined by the district for each type of dwelling unit.

 Given the following variables: A = Full cost fee for site acquisition costs = A1 + A2 + A3 A1 = Elementary school site cost per student x the student factor A2 = Middle school site cost per student x the student factor A3 = High school site cost per student x the student factor B = Full cost fee for school construction = B1 + B2 + B3 B1 = Elementary school construction cost per student x the student factor B2 = Middle school construction cost per student x the student factor B3 = High school construction cost per student x the student factor C = Full cost fee for temporary facilities maintenance = C1 + C2 + C3 C1 = Elementary school temporary facility cost per student x the student factor C2 = Middle school temporary facility cost per student x the student factor C3 = High school temporary facility cost per student x the student factor D = State match credit = D1 + D2 + D3 D1 = Boeckh Index x SPI square footage per student for elementary school x state match % x student factor D2 = Boeckh Index x SPI square footage per student for middle school x state match % x student factor D3 = Boeckh Index x SPI square footage per student for high school x state match % x student factor TC = Tax payment credit =    the net present value of the average assessed value for the dwelling unit type in the school district, <(1+I)n>-1 I(1=I)n x the current school district capital property tax levy rate, I(1+I)n, where I = the current interest rate for outstanding bond issues n = the number of years left before the bond or capital levy is retired, up to a maximum of 10 years FC = Facilities credit =    the per dwelling unit value of any site or facilities provided directly by the development subject to ACC 19.02.090 FC = Value of fee payer’s contribution Number of dwelling units in the development Then the unfunded need (UN): UN = A + B + C – D – TC The Fee Obligation: Total Unfunded Need x 50% = Fee Calculation

Where, in addition to the definitions in ACC 19.02.020:

A. “Boeckh Index” means the area cost allowance for school construction determined under WAC 180-27-060.

B. “SPI square footage per student” means the space allocations per grade span determined by WAC 180-27-035.

C. “State matching credit” means the calculation set forth in Attachment A of the district’s Boeckh Index times SPI square footage per student per grade span times state match percentage times applicable student factor.

D. “State match percentage” means the percentage of school construction costs for which a district is eligible to receive state funding pursuant to RCW 18A.525.166 and the rules of the State Board of Education.

E. “Tax payment credit” or “TC” means the calculation in the formula of the district’s average real property tax-determined value for single-family dwelling units or multifamily dwelling units times the district’s capital property tax rate as adjusted by the current interest rate for any bonds being retired by a capital tax and the number of years each capital levy tax shall be imposed up to 10 years. The district’s capital tax rate consists of authorized tax levies to retire bonded indebtedness incurred for school district capital purposes under Chapter 28A.530 RCW and school facility levies for construction, remodeling, and modernization under RCW 84.52.053. (Ord. 6341 § 2, 2011; Ord. 5950 § 1, 2005; Ord. 5096 § 1, 1998.)