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I ~ I Subwatersheds 4 and 5: Hardwood Creek East and Hardwood Creek North Policies: A.3, B.l, B.Z, B.3, B.4, B.5, C.l, Co2, C.3, CA, C.5, D.l, Do2, E.l, E.2, E.3, E.5, and F I I I This combined watershed totals 19.52 sq mi and contains Egg, Rice, Oneka, and Horseshoe Lakes. The area is drained by Hardwood Creek (AnokalWashington Judicial Ditch No.2) which is very flat and has limited discharge capacity. These subwatersheds have extensive floodplain and wetland areas which are being preserved due to the low density development occurring in this area located outside ofthe MUSA boundary. I I I The District has maintained several water quality monitoring stations in these subwatersheds and also conducted intense monitoring during the Centerville/Peltier diagnostic study. Several potential wetland restoration projects are being contemplated in addition to the feedlot control practices to be implemented with the cooperation of the Washington SWCD. . I Subwatershed 6: Hardwood Creek West Policies: . A.3, B.l, B.Z, B.3, B.4, B.5, C.l, C.2, C.3, CA, C.5, D.l, Do2, E.l, Eo2, E.3, E.5, and F I This subwatershed is approximately 8.71 sq mi in area. Horseshoe Lake is located in the subwatershed but provides little .active storage due to its landlocked nature. Storm water modeling indicates there will be a slight increase in flows from present day to year 2000 conditions. More significant increases in flow rates could Occur if the capacity of Hardwood Creek channel is increased. I I l The Upper Watershed Improvement Project will seek to address agricultural land use in the watershed and potential wetland restoration sites. A ferric chloride injection system is contemplated at the mouth of this subwatershed. It is anticipated that low density urbanization of this subwatershed may result in improved water quality relative to its present land use. I I .4-17 10/97