2005/08/10 Council Agenda Packet

• lb. Where Compensation Can Occur. Compensation for impacts to vegetated palustrine wetlands may occur within the same Ecological Management Unit or within the adjacent Ecological Management Unit (See EMU Map, Figure 2.2 in the 1997 SEWIP). 2. Minimum Compensation Requirements. The minimum requirements for compensation will be one acre of restored wetland for one acre of wetland lost. 3a. How Compensation is Calculated. The acreage of compensation shall be calculated from the IVA function performance scores using the following ratio, provided that the minimum compensation requirement of regulation 35.B.2 is met (see 1997 SEWIP Figure 2.4 for example): IVA score for per acre function lost X (1.25)X (acres lost)=Acreage of compensation IVA score for per acre function gained This regulation applies when the restoration credits are less than the impact debits and the calculated "Acreage of Compensation"will not be less than the acreage loss; otherwise regulation 35.B.2 should be applied. The 1.25 multiplier is included in this ratio calculation to compensate for the temporal loss of wetland functions at the impact site during the time required for the functions at the compensation site to approach the"pre- impact" level of performance. 3b. How Compensation is Calculated When Regulations 35.B. 2 and 9 are Met. In cases where the performance standards established for"year 5"have been met (see 35.B.9), the acreage of compensation shall be calculated from the IVA function performance scores using the following ratio, provided that the minimum compensation requirement of regulation 35.B.2 is met: IVA score for per acre function lost X (acres lost) =Acreage of Compensation IVA score for per acre function gained This regulation is intended to provide incentive to developers for the creation of large wetland compensation banks. The 1.25 "temporal"multiplier is not included in this ratio calculation because the compensation site has demonstrated through monitoring (Regulation 35.B.9)that wetland functions are performing as proposed in the compensatory mitigation plan. 4. Compensation is Based on Limiting Function. Under Regulations 35.B. 3.a and 3b, the acreage needed for compensation shall be calculated separately for the Water Quality Improvement and Habitat groups of functions. Whichever group of functions requires the greater acreage for compensation (i.e. which is the limiting group of functionsi) shall t The"limiting group of functions"shall be defined as that group of functions(e.g.Water Quality Improvement or Habitat)which exhibits the least average increase in IVA score per acre for a particular restoration site. 98 33