Laserfiche WebLink
A thorough documentation and mapping of present-day wetlands and streams was prepared as part of <br /> the site analysis preceding the Public Amenities Master Plan. Monitoring of existing stream flows, <br /> wetland hydrology, and tidally-influenced river water levels is ongoing, and contributes to our <br /> understanding of the site hydrology. <br /> Overview of Stream and Wetland Systems <br /> The Riverfront Development site contains two primary drainages that convey water from sub-basins <br /> within the Lowell neighborhood and other parts of the city to the west and south. The two primary sub- <br /> basins that discharge surface water to the site are the Bigelow Creek sub-basin and the West Ditch <br /> sub-basin. Both drainages flow northward along the active and the recently-vacated Burlington <br /> Northern Santa Fe Railway corridors, flow along the toe of the Landfill site, and combine before <br /> becoming tributary to the Snohomish River near the center of the private developer's site. The Bigelow <br /> Creek and West Ditch Creek sub-basins are 178 acres and 187 acres, respectively, and both sub- <br /> basins provide year-round surface water that supports both Bigelow Creek and the West Ditch Creek <br /> as perennial stream systems. Both systems support various salmonid and non-salmonid fish. In <br /> addition, the Riverfront Development site includes several other sub-basins that contribute flows to <br /> these two larger drainages, and several stream channels independently convey surface water flow from <br /> the larger wetland complexes to the Snohomish River. <br /> 9/TC t \ � �� "' .../.` ,4.4!1( <br /> ti <br /> f � r OM4nd r ) _ '''''''v <br /> Lr:ne v' _ _ <br /> ti \ r Wetland W)i r- ''''''''<' <br /> til' <br /> WWndI \ IndD pad / , �,,_ �,It- ,,1 -'+ ` <br /> ® 1 L. tlnd bfbf <br /> ii- 11 —WeWndJ <br /> - LEGEND wafted it ',',:. WMYa4X Worland „....„4.. 2 <br /> --� �'� <br /> • - <br /> Sue <br /> —LonL reaenw Denwe.r • <br /> eSKohonih R _ - <br /> -- <br /> IESk <br /> 14,1.4 _ <br /> etc i' ]WSxm\Vear!OWe�m --____ <br /> 9 <br /> F.. (Wa2r icaeeme•M <br /> --Gw 3.1 6 14nride. <br /> 1144e Are.6....1, <br /> _-� <br /> WM.:...sc NnlKdmY <br /> FM»Yey-crln N. <br /> Wetlands within the study area. <br /> Cree• k l �� --� __-. _,__ I' it I tet_ t-vrr =_ , <br /> -,-- --▪ -' , -. West ILeh• - . <br /> .,;:,°--- <br /> r c,:,,, _� <br /> ..�_ _te <br /> _ _ y > <br /> — _ <br /> ,�—fbtamRA Oae/M�na GlpNow� � Gaek ,-,;,7.-- - <br /> i <br /> Wetland_j --' <br /> �-..; '_._ <br /> ..\ GhmnNs - SII Nn C� <br /> �ti>r <br /> -_—.—._�___ LEGEND <br /> .> .. - x _- <br /> �tr.a6•P.tv+c.�enaw Snohomish Rim- <br /> _ _ �yMak�-.rr <br /> 4. i ''Leo v --1747:::::"`-'" <br /> N c w.une ---errand <br /> Streams within the study area. <br /> 14 Riverrront Development Public Amenities Master Plan <br /> 52 <br />