11217 19TH AVE SE 2016-01-01 MF Import

Thc USGS Bvcrett 7.5 minutc yuadramglc topographic m.ip (US:;S, 1953) does not idcntify any streams in the vicinity of the site. 'I'his suggests that the on-site Jninage has likcly been artificially crcatecl as a result of past land usc in ihc vicinity. The on-site drainage follows an unnatunl alignmcnt that was cstablishcd along the property Uoundary. Thc drainagc has no channel along thc northern portion of Uie property and tlows through a canstnicted ditch along the souQiern portion of Ihe property. The lack of a defined channel and its presence in a grass-lined swale along the northem portion of lhe site suggest that the drainage does not qualify as a strcam following thc City of Gvere�t definilion. Flo�vever, this drainage appcars to convcy at Icast some flows from natural sources (:veUands). Although thesc natural (lows alonc may not be sufficicnt enough to support a strcam a s sugsested by thc absencc of mapped strcams ncar the site on the 1953 USGS tonographic map, hi:toric data necessary to detemiinc this is lacking. "fherefore, thc presence of at le:�st some natural (low supports its dassification as a strcam following thc City of Everett definition. Given thc lack of a defincd channr,l, occurrcncc in a s�valc, intcnnittent flows, and lack of fish prescncc, �hc norihern segment qualifics as a Category IV strcam. Considering tl�at thc Oows within thc drainage are not sufficient to estaUlish a scourcd channel along thc northern s�gmenl, it is likely that in the absence of the excavated ditch, thc drainagc would also have no defincd channel along thc southcm on-site segment. Furthcmiore, the natural flows alonc would bc less likcly to liave sufficicnt energy to create a scoured channel. Therefore, given lhe interniittenl n.rture, occurrence within a constn�ctcd ditch immediately downstream of the segment without a defined channcl, m�d lhe absence of fish, ihc southem segment would also qualify as a Category N strcam. Catcgory N strcams have a 10-foot minimum Uuffcr rcquircmcnt. Silver Lake qualifies as a Calegory I wetland follo�ving the City's Municipal Code. Category I wetlands have a 100-foot buffer rcquirement. This buffer lics within the SR 527 right-of-way wherc road improvcments arc currenQy proposcd by thc Washington State Deparlment of Transportation. Silvcr Lakc buffcr implications are bcing addressed under U�e SR 527 lmprovemenl project and should not influcncc site development north of the right-of-way. 3.4 RGCULATORY AUT[�IORITY �edcral,state, and loail regula�ions apply to dcvelopmcnt proposals in and near wctlands. Agencies bavingjurisdiction over developmcn� activitics that affcct �vetlands include, but are not limitcd to the Corps, Washingtou Statc Departmcnt oC Ecology(Ecology), and U�e Ciry of Evcrett. The Corps administcrs Scction �104 of the Clean Water Act, �vhich rcgulatcs the dischargc of dredged or fill matcrials a��d othcr activitics in waters of the U.S including non-isolated wetlands. Ecology has review and approval authority for many federal, state, mid local pennits including tlre impicmentation of Scction dOl �Valcr Quality Certification as a cundition of Section�104 pemiitting implementcd by lhe Corps. 7't�c City of Everett n4unicipal Code defines development parameters in ' and around «�ctlands and othcr sensitive areas. l3ccausc �Vctland A is not isolatcd it appcars to fa11 undcr the jurisdiction of ihc Corps through Section �104 of thc Clcan Watcr r�ct. Iiowcver, thc Co�ps has thc ultimatc authority in making v�rnoownonwz�rosoo�envr��rsro�ve:��a H�rom.rwv nw ax Sensilivc Arcas Ecalualiun �) July 2004 _. tiilvcr I.ake CcNcr Properly �� ,�� �/