9425 18TH AVE W 2018-01-01 MF Import

CMI Homebuilder's Inc. 6.0 DEVELOPMENT IMPACTS Wetland Delinealio 1 Mdigation Report 6.1 Project Description The proposed project consists of the development of 46 single family detached condominiums, with an entry road, intemal road system, associated parking, and an underground stormwater detention vault (Sheet W9.0). Access to the development will be from 181h Avenue West. Access to the eastern portion of the site wiil require crossing Wetland A. 6.21mpacts to Sensitive Areas Although the project has been designed to minimize impacts to Wetland A, the proposed entry road must cross over Wetland A in the southem portion of the site. This road crossing would have a direct impact of approximately 2,007 sf (0.05 acres) to Wetland A. The Army Corps of Engineers (COE) issued a Nationwide Permit 14 (road crossings) on November 12, 1999 for 0.05 acres of wetland fill on the site. On January 23, 2002, the COE renewed the pem-�it for an additional two years (see Appendix C for a copy of the renewed permit). Wetland A is a Category II wetland according to Section 37.090 of the City of EveretYs Sensitive Areas Ordinance. Categoiy II wetlands generaily would require a 75-foot buffer according to Section 37.100(A) of the City's Code. According to Section 37.100(E). the planning director may, using �eview Process II.C., reduce the standard buffer width only when there has previously been substantial legal aiteration of the wetland buffer on the subject lot or adjoining lots. The planning director can allow up to 50 percent reduction in the standard buffer, with the approvai of a wetland buffer enhancement plan. Both the northem and southem portions of the buffer for Wetland A have been altered substantially. These areas consist of a mixture of Himalayan blackberry, pasture grasses, with some native shrubs. The project is proposing to reduce the buffer 50% in these rivo a� eas to 37.5 feet with enhancemeni. The City's code also states under Section 37.'100(F) "the city may allow buffer width averaging, provided that the total area on the lot contained within the buffer is not less than that required within the standard buffer'. The project is proposing to buffer average the remaining buffer in the central portion of the site. Buffer reduction will result in a loss of 3,218 sf of buffer. Buffer replacement of 3,224 sf will result in a greater than 75-foot averaged buffer. All buffer replacement areas will be located adjacent to the existing 75-foot buffer. 7.0 MITIGATION FOR IMPACTS The City of Everett requires a 3 1 replacement-to-loss ratio for impacted Category II wetlands that are forested (Wetland A) according to Section 37.110(C)5.b(i). The total required mitigation for impacts to Wetland A is 6,021 sf. Mitigation for impacts to Wetland A will occur adjacent to the northeast edge of Wetland A(see Sheets W1.0-W4.0, enclosed). The created wetland area will be located in a previously disturbed area that consists primarily of pasture grasses, Himalayan blackberry, and smali red aider trees. The created wetland area will be graded into a series of forested terraced ponds that drain to the west lhrough a network of log weirs (Sheet W2.0) before spilling into Wetland A. The created wetland wiil consist of primarily emergent and forested wetland components. The ponded areas of the created wetland will be planted with emergent species, with forested weiland species planted along the pond perimeters. This area cor,tains a few trees that will be graded around, but not removed, and inundated to create natural snags for increased wildlife habitat. A rock wall will be required to create vietland to the north property line. 20 May 2003 Talasaea Consultants, LLC 364C-MitRpt4(20May03).doc Page4 � �