19.02.020   Infrastructure improvements plan.
   A.   The County shall prepare an infrastructure improvements plan (IIP) that establishes the needed roadway capital improvements and is based on the LUA. The IIP shall:
   1.   Define and provide a map of all service areas within which the County will provide the necessary public services for which development impact fees will be charged. Each service area shall be defined in a manner that demonstrates a substantial nexus between the roadway facilities to be provided in the service area and the development to be served by those facilities.
   2.   Identify and describe the LUA upon which the IIP is based for each service area.
   3.   Analyze and identify the existing roadway level of service provided by the County to existing development.
   4.   Identify the roadway level of service to be provided by the County based on the relevant LUA and any established County roadway standards or policies related to required levels of service.
   5.   Identify the existing capacity of the roadway facilities in each service area, the utilization of those facilities by existing development, and the available excess capacity of those facilities to serve new development including any existing or planned commitments or agreements for the usage of said capacity.
   6.   Estimate the total number of future EDUs within each service area based on the County's LUA and projected new development in each service area.
   7.   Provide a summary table describing the level of service by relating the required roadway facilities to EDUs in each service area and identifying the applicable EDU factor associated with each category of development.
   8.   Analyze and identify the projected utilization of any available excess capacity on the existing roadway facilities and all new or expanded facilities that will be required to provide and maintain the planned level of service in each service area as a result of the new projected EDUs in that service area for a period not to exceed ten years.
   9.   Estimate the total cost of any available excess capacity and/or new or expanded capital facilities that will be required to serve new EDUs, including cost of land acquisition, improvements, engineering and architectural services, studies leading to design, design, construction, financing, and administrative costs. Total costs should not include costs for on-going operation and maintenance of facilities, nor for the replacement of facilities to the extent that replacement is needed to serve existing development.
   10.   Forecast the revenues from taxes, fees, assessments, or other sources that will be available to fund the new or expanded facilities identified in the IIP, which shall include estimated state-shared revenue, highway user revenue, federal revenue, and property taxes.
   11.   Calculate required offsets as follows:
   a.   From the forecasted revenues, identify those sources of revenue that are attributable to new development and will contribute to paying for the capital costs of necessary public services.
   b.   For each source and amount of revenue identified, calculate the relative contribution of each category of development to paying for the capital costs of necessary public services in each service area.
   c.   Based on the relative contributions, calculate the total offset to be provided to each category of development in each service area.
   d.   Convert the total offset to be provided to each category of development in each service area into an offset amount per EDU by dividing the total offset for each category of development by the number of EDUs associated with that category of development.
   12.   Calculate the plan-based cost per EDU by determining the cost per EDU to provide the necessary public services for the overall County.
   B.   The County may reserve capacity in an IIP to serve one or more planned future developments, including capacity reserved through a development agreement. All reservations of existing capacity must be disclosed in the IIP at the time it is adopted. (Ord. 2020-27 § 1 (part), 2020)