MCWD Permit - Laserfiche WebLink

Home Browse Search

Sullivan Property Modified Level 1 Wetland Delineation Report and No-Loss Application 4.3 Historical Review of the Excavated Pond An anecdotal history, site conditions observed in the field, and historical aerial photography indicate that the wetland basin was previously excavated. During an onsite pre-application meeting with the MCWD on September 16, 2016, Tim Sullivan explained how the original homeowner told him that the wetland previously existed as a grassy wet meadow containing debris and old appliances. The previous owner removed the debris and excavated the wetland to create the pond that exists today. Hennepin County property information shows that the home was built in 1986. The wetland excavation likely occurred around that time. Evidence supporting the excavated wetland determination includes: 1. NWI mapping, which is based on 1980s color infrared aerial photogaphy, shows the wetland as a PUBGx, and"x" indicates excavated. 2. The 1974 Hennepin County Soil Survey(based on field work in 1960s) shows the wetland as a symbol that means"small depression,poor to very poorly drained." 3. Aerial photographs from 1937, 1945, 1956, 1960, 1962, 1967, 1971, and 1994 (8 years) don't show the open water area until 1994 (Table 4,Appendix C). Table 4. Aerial photo history of pond location Aerial Photo Date Condition Observed at Pond Location 5-Ju1-1937 Scattered trees no o en water Unknown-1945 Trees with o enin s, small area of otential wetland/seasonal floodin 7-Ma -1956 Mostl wooded,no o en water 8-Ma -1960 Mostl wooded, small de ression, ossibl with seasonal floodin 3-Ma -1962 Mostl wooded, small de ression, ossibl with seasonal floodin 4-Dec-1967 Wooded,no ice or o en water 9-Nov-1971 Wooded,no o en water 11-Oct-1994 Open water area covering an area about 4-6 times larger than the area of ossible seasonal floodin observed durin 1960-62 4.4 Request for Wetland Boundary and Jurisdictional Determination Appendix A of this report includes a Joint Application Form for Activities Affecting Water Resources in Minnesota, which is submitted in request for: (1) a wetland boundary and type determination under the Minnesota Wetland Conservation Act(WCA), and(2) delineation concurrence and an Approved Jurisdictional Determination(AJD)under Section 404 of the Federal Clean Water Act. 5. NO-LOSS APPLICATION The landowner would like to remove accumulated sediment down to the blue-gray clay layer, which corresponds to the depth of the original excavation. Excavation of sediment with an excavator or backhoe will restore the deepwater habitat to the previous maximum pond depth of approximately 10 feet, which existed following the original excavation. 6