1997-021 - Laserfiche WebLink

Home Browse Search

n M SECTION 2 Water Impact Fee Calculation This section describes the calculation of thero osed water impact fee.Th a p p p e capital investment in the water treatment facilities and water transmission and distribution system, including planned improvements to each system,is determined first.This capital invest- ment is then divided by the capacity of each system component to derive the unit invest- ment per mgd of capacity.Adjustments to this unit investment for future debt service principal payments and carrying costs are then made to derive the net unit investment per mgd of capacity.This net unit investment per mgd of capacity figure is then multiplied - by the capacity requirements of an ERU to derive the proposed impact fee per ERU.The changes in the water impact fee from current charges and a comparison of these charges with impact fees collected in other communities and counties is also presented. 2.1 Unit Capital Investment Unit capital investment calculations were performed separately for the water treatment facilities and the water transmission and distribution facilities.Capital investment calcula- tions for the water treatment facilities were limited to the most recent increments of capac- ity added to the water system at each treatment facility,as the County does not anticipate constructing additional treatment capacity during the study period(FY 1997 through FY 2001).The capital investment calculations for the water transmission and storage facilities included all current and planned capital improvements to the distribution components of the system through buildout(Year 2010). 2.1.1 Water Treatment Facilities The County's water treatment facilities consist of three facilities:the North Beach,North County,and South County water treatment plants(WTPs).Expansions of the North Beach and South County facilities have been constructed during the last 4 years.The North County WTP was constructed in 1995.Recent capacity additions at these facilities have cost in excess of$24 million and provide 13.66 mgd of treatment capacity.The weighted average unit cost of these facilities per mgd of capacity is estimated at$1,771,000.Exhibit 2-1 summarizes these calculations. 2.1.2 Water Transmission Facilities The County's investment in water transmission and storage facilities in 1993 was estimated at more than$25 million.An additional$10 million of improvements to the water transmis- sion and storage facilities have been made since that time,and an estimated$73 million of improvements are planned to be constructed prior to system buildout in 2010.At buildout, i the water system is expected to have a capacity of 39.14 mgd.The unit investment per mgd of buildout capacity is estimated to range from$2.0 to$2.3 million per mgd during the 5-year study period.Exhibit 2-2 shows these calculations. OFIW12073.DOC 2-1