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a <br />._.. .._.._. SEP-24-'90 15:57 ID: CI TY OF EVERETT PLRN TEL t10:2C�6-259-874^_ ti7_�� �4 P - <br />• a <br />i <br />STATE OF WASHINGTON <br />DEPARTMENT OF ECOLOGY Mail Stop pV-11 • O/yrrpia, Washington 98504-8711 • (2a5) 454n, <br />1990 <br />S;I F <br />ac4er <br />Mr. Gary Doughty \ <br />City of Everett <br />Planning Department <br />3002 Wetmore <br />Everett, WA 98201 <br />SE? - i <br />12, 1990 CITY sing Deft• <br />Re: Boeing Employee Activity Center <br />Dear Mr. Doughty: <br />At your request, I have reviewed the Site Characterination and <br />Wetland Compensatory Report prepared by Dames and Mooxe and have <br />the following comments and recommendations. <br />The proposal calls for the creation of 6 minimum of 0.6 acres of <br />wetlands in Japanese Gulch drainage as compensation for the loss of <br />0.28 acres of forested wetland,, elsewhere on the site. The plan <br />appears to meet Ecology's recommended replacement ratio of 2.0:1.0 <br />f-n compensation of forested wetlands. As a result, i feel that if <br />t.e mitigation plan is properly planned and executed the project <br />should provide adequate compen�.ation for the wetland losses. <br />At this point, I recommend that the Boeing's consultants proceed in <br />developing a more detailed mitigation plan. The mitigation plan <br />should include the following components: goals and objectives, <br />construction plans, detailed revegetation plans, information on the <br />expected hydrology, contingency plans, monitoring plan, <br />construction schedule and a performance bond. In audition, the <br />mitigation site should be designed to maintain some standing water <br />through at least late spring in order to maximize the habitat <br />value. Furthermore, soils from the existing wetlands should be <br />used to top off the mitigation wetlands. This will make the site <br />less permeable and will growth of wetland vegetation by introducing <br />seeds and rhizomes that are contained in the soil. <br />Lastly, it is the recommendation of Ecology that the mitigation <br />site be constructed prior to or concurrently with the destruction <br />of the existing wetlands on the site. If for any reason this is <br />not possible, we recommend that the acreage replacement ratios be <br />increased to adequately compensate for construction delays. In <br />addition, a performance bond should be posted of a sufficient value <br />to ensure that the mitigation wetlands are constructed <br />satisfactorily. <br />..4R�. <br />0 <br />no <br />