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13 <br /> (Regulation 35.B.98)that wetland functions are performing as proposed in the <br /> compensatory mitigation plan. <br /> 4. Compensation is Based on Limiting Function. Under Regulations 35.B. 3.a and 3b, the <br /> acreage needed for compensation shall be calculated separately for the Water Quality <br /> Improvement and Habitat groups of functions. Whichever group of functions requires <br /> the greater acreage for compensation (i.e. which is the limiting group of functions1) shall <br /> determine the required "overall compensation acreage2"in order to ensure that the <br /> limiting function is adequately compensated for. Excess compensation acreage3 for the <br /> non-limiting function shall not be available as compensation for other wetland impacts. <br /> 5. When to Use Average Restoration Potential Per Acre. An average restoration potential <br /> per acre shall be used to establish the compensation requirements in cases where several <br /> wetland complexes are restored simultaneously(as in a compensation bank). This <br /> average is to be calculated by summing the potential increase in IVA acre-points for each <br /> group of functions and dividing by the total acreage of the site. This average shall then <br /> be used to determine the acres of compensation required according to regulations 35.B. 2 <br /> or 3. <br /> 6. SEWIP Restoration Plan is a Guide for Objectives and Goals. The SEWIP restoration <br /> plan for an individual site must be used as the basis for setting the goals and objectives of <br /> any compensation proposed. <br /> 7. Guidelines for Developing Compensatory Mitigation Plans. Compensatory mitigation <br /> plans with applicable performance standards submitted under the SEWIP plan should <br /> follow the interagency"Guidelines for Developing Freshwater Wetlands Mitigation Plans <br /> and Proposals" (Department of Ecology Publication#94-29, 40 pp). <br /> 7a. Threatened, Endangered or Commercially Important Species. If areas in the development <br /> footprint have SEWIP-mapped "threatened, endangered or commercially important <br /> species," then the compensation plan shall incorporate design measures to mitigate any <br /> impacts to these species. (See 1997 SEWIP Figures 2.5 and 2.6.) SETOC will amend the <br /> Plan to incorporate any new mapped areas of threatened, endangered or commercially <br /> important species. If a COE regional permit is adopted,then the amendment process <br /> must meet the requirements of that permit4. <br /> 8. Use of Restoration Acreage in Lieu of Maintenance& Contingency Bond. The <br /> restoration- ditional we4a-; - - . -; 'n--lir . •.' - - <br /> t The"limiting group of functions"shall be defined as that group of functions(e.g.Water Quality Improvement or Habitat)which <br /> exhibits the least average increase in IVA score per acre for a particular restoration site. <br /> 2"Overall Compensation Acreage"shall be defined as the required acreage of compensation calculated from regulation G.3 for the <br /> limiting group of functions(e.g.either Water Quality Improvement or Habitat). <br /> 3"Excess Compensation Acreage" is when the calculated acreage of compensation for the"non-limiting"group of functions is <br /> subtracted from the"Overall Compensation Acreage." <br /> 6 <br /> 41 <br />